In Specific, The Mass Of A Volatile Unknown Liquid Was Discovered With The Use Of The Calorimeter

1015 words - 5 pages

This is a standardized lab write up for an American Advanced Placement Chem class dealing with the use of a calorimeter. In specific, the mass of a volatile unknown liquid was discovered with the use of the calorimeter.Experiment Eleven - Heat Effects and CalorimetryIn this lab, molar mass of a volatile liquid was determined through the use of a calorimeter The lab validates the equation Q=S.H * M * T, by using the known or calculable values of QH20 and setting them equal in magnitude to Qmetal. This equation depends on the conservation of energy in the form of Delta T.We concluded that the molar mass was around 74.81, and that the specific heat of this metal was about .334, This ...view middle of the document...

Trial 1 Trial 2Mass of stoppered test tube plus metal (grams) 77.8 76.9Mass of test tube and stopper (grams) 47.3 46.8Mass of Calorimeter (grams) 48.1 47.7Mass of Calorimeter and water (grams) 84.6 87.3Mass of Water (grams) 36.5 39.6Mass of Metal (grams) 30.5 30.1Initial temperature of water in calorimeter *C 21.1 20.4Initial temperature of metal (assuming 100*C unless directed to do otherwise) 100 100Equilibrium temperature of metal and water in calorimeter 26 25Change in water temperature 4.9 4.6Change in metal temperature 74 75qH2O 747.59 761.43Specific heat of the metal (Eq. 3) .3312 J/g*C .3373 J/g*CApproximate molar mass of metal 75.5 74.12Unknown No. Unknown.Sample Calculations For Trial One.Calculation Answer ExplanationChange in water temperature 4.9 T initial - T final21.1 *C - 26 *CSince this is a magnitude it can be positive.Change in metal temperature 74 *C T initial - T final100 *C - 26 *CSince this is a magnitude it can also be positive.qH2O 747.59 Q = S.H*M*T(4.18)(36.5)(4.9)Specific heat of the metal (Eq. 3) .3312 QH2O = Qmetal747.59 =S.H(30.1)(75)S.H = .3312Approximate molar mass of metal 75.5 Molar Mass = 25/S.H25/.3312=75.5Error AnalysisAn avoidable error may have been committed by under-heating the metal This would have made the result...

KEEP READING

Molar Mass Of A Volatile Liquid - CHM 111 - Formal Lab Report

1039 words - 5 pages ... determine the quantity of gas under given conditions of pressure, volume, and temperature. In this experiment, an unknown volatile liquid is heated in a boiling water bath and is vaporized. The vapor forces air from the flask through a tiny pin-hole in the foil cover, until the pressure within the flask equals the barometric pressure of the lab. As with all gases the vapor occupies the entire volume of its container. The temperature of the vapor ...

This Is An Essay Regarding The Theme Of Symbolism In Rosario Ferre's Work The Youngest Doll. The Specific Theme Is The Use Of Dolls As A Representation Of Women

617 words - 3 pages ... which the aunt prepares the doll, such as, "Then she would make a wax mask of the child's face, covering it with plaster on both sides, like a living face wrapped in two dead ones (483)," re-entrench the concept that it is not only men but women who view the female in a diminished sense. This is further developed when the aunt states, "She would reassure the grooms by explaining to them that the doll was merely a sentimental ornament, of the kind ...

Describe The Main Characteristics Of A Specific Style Or Period In Jazz Since World War II

1718 words - 7 pages Free ... heard in a recording of "Shaw 'Nuff" - Dizzy Gillespie All-Star Quintet, recorded in 1945. Here we hear the introduction with a heavy rhythmic vamp, with the piano leading to the first chorus where you hear the use of extended melodic lines crossing the phrases. 'More often than not the harmonic complexity of modern jazz was implicit...most bop compositions simply followed, more or less, the conventional progression of prewar standards.' (Gioia ...

Crisis-prone And Volatile: The Downturn In Relations Provoked By The Executions Of Bali Nine

4286 words - 18 pages ... CHAPTER ONE Crisis-prone and volatile The downturn in relations provoked by the executions of Bali Nine 'co-ringleaders' Andrew Chan and Myuran Sukumaran was arguably the third to occur in the Australia-Indonesia relationship since Tony Abbott became prime minister in 2. 013. It had been less than a year since the formal end of the previous crisis between Australia and Indonesia, sparked by Edward Snowden's revelations of alleged Australian ...

Mass Effects On The Terminal Velocity Of A Coffee Filter Falling In Air

1148 words - 5 pages Free ... Materials used for data collection motion sensor coffee filter 2.0m lab bench 2 Procedure: 1) Materials were set-up according to Figure 1. Within Data Studio, the motion sensor was connected and a graphical display of velocity vs time was set-up. 3) Air temperature in the room was measured and recorded with the thermometer. The air temperature was monitored throughout the data collection for any variations. Using the electronic balance the mass ...

Essay On The Use Of The Internet In Mar

1245 words - 5 pages ... scope to take risks and still recover.Reports suggest that at the end of last year there was huge optimism about e-commerce among SME's corresponding with an increase in websites been set up. However this year has seen a slump in terms of smaller firms in terms of setting up and maintaining websites. This evidence suggests that SME's were to quick to jump on the bandwagon last year and are feeling the effects of major loss's. In these terms ...

To Analyze Specific Scenes In The Silence Of The Lamb - NYU - Essay

1038 words - 5 pages ... true identity, Starling is forced to trade her worst lingering childhood memory, the screaming of lambs before their slaughter, for information that ultimately leads her to Buffalo Bill. Shortly after, Lector murders his guards and escapes the asylum, leaving Starling to continue her investigation on her own. In a final confrontation, Starling is forced to kill Buffalo Bill, but saves the senator's daughter and earns a promotion with the FBI ...

The Use Of Animals In Medical Research

1134 words - 5 pages ... This essay is about the use of animals in medical research. This essay talks about why labortatory animals are needed to help in the discovery of vaccines and cures, easing the burdern of chronic deseases, and ensuring humans a safe food supply. Includes the benefits and contributions animals have in medical research.Since the ancient Greeks, experimental animals have been very important to our understanding of the biological processes that ...

The Use Of Carbon Compounds

1069 words - 5 pages ... the unburn fuel and burn it separately, so it doesn't sit below the oxygen and harm people. Car Pollution I chose this picture of piled-up traffic on a motorway because they are all burning either Diesel, LPG or Petrol which creates CO2 which is causing air pollution. This can be seen in the picture to the right in all the smog above the cars. People use Diesel because of how well it runs as a fuel and how economical it is to run cars with ...

The Use Of Symbols In "A Streetcar Named Desire" By Tennessee Williams

1368 words - 6 pages ... discovery of love as a girl she says, " It was like you suddenly turned a blinding light on something that had always been half in shadow. That's how it struck the world for me. But I was unlucky. Deluded." (Williams 95). This shows where Blanche's affliction with light stems from and why she hides herself in obscure light, too afraid she might be hurt again if she lets the vivid light back in. Just as Blanche finishes telling Mitch about her deceased ...

The Laws Of Gravity Overcome Earths Amazing Scientist To Believe The Unknown - English - Science

1191 words - 5 pages ... you choose to connect Melinda to the seasonal changes of a tree, you would focus on fall, winter, and spring/summer (these 2 will go together). Choice 2: Explain the phases her tree art went through, over the course of her freshman year, and how do they represent her. Connect each phase to her own changes and transformation. Be specific. This would focus on her art project instead of the seasonal changes or cycle of life stated in choice 1. You ...

Ethical Issues With Drug Use In The Sports World

3109 words - 13 pages ... is true they will never catch all athletes, however, if they were to get rid of drug testing this may in a way condone the use of performance enhancing drugs in the highest level of sports. Also, would this get rid of a form of protection for the athletes, if there was no deterrent from using drugs, athletes may take more drugs because it is legal, and lead to possible deaths. Finally, if drugs were made legal in sport, athletes again may consume ...

The Responsibilities Of The Registered Nurse With Regards To The Use Of Social Media - Bachelor Of Nursing UNISA - Essay

848 words - 4 pages ... What are the responsibilities of the registered nurse with regards to the use of social media? Using social media has a numeral benefit as a nursing students and Registered Nurse. To begin with, why it is important to be accountable as a registered Nurse while using social media. Firstly, how people’s life tend to impact by the internet and technology to find any related information through different type of social media website. Moreover ...

Oral History Of Media In The 20th Century - Mass Communication - Oral History Report

1343 words - 6 pages ... about the cost of cable when it first came out, but did remember having to use rabbit ear antennas for their set. Jerri did describe how television used to end for the day, which is a memory I actually shared with her, since I also remember that when I was a young child. It would end in her day at ten to eleven at night until about eight in the morning. Throughout the night, the televisions would only show a test pattern until programming resumed the ...

A Mass Spectrometer Inlet System For Sampling Gases Dissolved In Liquid Phases

4128 words - 17 pages ... , membrane support, and a leakproof method of attaching the membrane to the support. The support (necessary to provide mechani- cal strength) used was "alundum" ceramic, and 'LTeflon" gaskets provided the seal. The gaskets were cut from g-in. Teflon sheet. Gas molecules migrate directly to the ionization region of the mass spectrometer after leaving the ceramic disk. The ceramic disks can be conveniently shaped with emery paper. A tool was made to punch ...

In Specific, The Mass Of A Volatile Unknown Liquid Was Discovered With The Use Of The Calorimeter

More like In Specific, The Mass Of A Volatile Unknown Liquid Was Discovered With The Use Of The Calorimeter