HW1 - U1M1 Homework. Due in 2 days O 1/15 answered Energy Exchanged Homework Unanswered Click on the region of these energy transfer (AE) versus temperature (T) graphs that corresponds to a phase change from gas to liquid. ΔΕ AE O Targets placed: 0/1 Delete selected Remove All Undo 3 Fullscreen You can place up to 1 targets

HW1 - U1M1 Homework. Due in 2 days O 1/15 answered Energy Exchanged Homework Unanswered Click on the region of these energy transfer (AE) versus temperature (T) graphs that corresponds to a phase change from gas to liquid. ΔΕ AE O Targets placed: 0/1 Delete selected Remove All Undo 3 Fullscreen You can place up to 1 targets

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter2: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 2.14E: A 5-mmdiameter hailstone has a terminal velocity of10.0m/s. Assuming its mass is6.031025 kg and all...

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A mixture of propane and methane occupied 122 mL at 25⁰C and 1.0 atm. This mixture was totally burned in excess O2 to produce CO2(g) and H2O(g). The mass of the CO2 produced was 0.506 g. What is the mass % composition of the original mixture? Show all work.
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1atm . The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to absorb 201.kJ of energy. The position of the piston is monitored, and it is determined from this data that the system does 121.kJ of work on the piston during the reaction.
Ammonia (considered to be ideal gas, 1 mole) initially at 25 degree C and 1 bar pressure is heated at constant pressure until the volume has tripled.Use CP = 25.895 + 32.999 x 10^– 3 T – 30.46 x 10^– 7 T2 , J/mole-KCalculate: a) Q b) W c) delta H
The gas inside a cylinder expands against a constant external pressure of 1 atm from a volume of 5 L to a volume of 13 L. In doing so, it turns a paddle immersed in 1 L of water and the temperature of the water has increased. Calculate the temperature increase of the water, assuming no loss of heat to the surrounding or frictional losses in the mechanism. Take the density of water to be 1 g/cm3 and its specific heat to be 4.18 J K-1 g-1.
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of the 1 atm. The cylinder is also submerged in a large insulated water bath. From previous experiments, this chemical reaction is known to absord 105. kj of energy. The position of the piston is monitored, and it is determined from this data that the piston does 255. kj of work on the system during the reaction. Is the reaction exothermic or endothermic? (exothermic or endothermic) Does the temperature of the water bath go up or down? (up, down, neither) Does the piston move in or out? (in, out, neither) Does heat flow into or out of the gas mixture? (in, out, neither) How much heat flows? Round your answer to 3 significant digits.
This was a lab I performed where we mix aqueous 25ml HCl and 25ml NaOH and use a program called microlab to determine the cooling rate after the initial heating. We used a coffee cup calorimeter that had a stirring bar. At first, NaOH solution is by itself in the coffee cup calorimeter. It’s temperature was 23.02 C. I waited for 70 seconds and then added the 25ml of HCl to it. The temperature rose to 29.59 C, then began to cool down immediately. The cooling rate was y=0.0089x+26.1273 according to the program. The final weight of the solution was 47.147g. The moles of NaOH was 0.919M and HCl was 1.033M. The questions: calculate the theoretical value for change in delta Hrxn.
This was a lab I performed where we mix aqueous 25ml HCl and 25ml NaOH and use a program called microlab to determine the cooling rate after the initial heating. We used a coffee cup calorimeter that had a stirring bar. At first, NaOH solution is by itself in the coffee cup calorimeter. It’s temperature was 23.02 C. I waited for 70 seconds and then added the 25ml of HCl to it. The temperature rose to 29.59 C, then began to cool down immediately. The cooling rate was y=0.0089x+26.1273 according to the program. The final weight of the solution was 47.147g. The moles of NaOH was 0.919M and HCl was 1.033M. The question: Using the volumes and concentrations of the HCl and NaOH solutions used in the experiment,calculate the moles of H2O formed in the neutralization reaction.
Sulfuric acid is a very important chemical and an indicator of a nation's industrial strength. Worldproduction in 2004 was about 180 million tons. Most of this amount (~60%) is consumed for fertilizers,particularly superphosphates, ammonium phosphate and ammonium sulfates. Sulfuric acid is needed to dissolvevery insoluble phosphate ores. Reaction to produce Sulfuric acid : 2S(s) + 3O2(g) + H2O(l) <-> 2H2SO4(aq)Determine the standard free energy and the equilibrium constant at 25°C. G° =K =
wo spherical vessels of different sizes contain the same gas and are connected by means of a pipe with a valve. Sphere A has a diameter of 5 foot at the given pressure gauge of 50 kgf/cm2. Sphere B contains the same gas at 20 kgf/cm² gauge. The valve is opened and when the properties have been determined, it is found out that the gauge pressure is 36 kgf/cm2. The temperature at the two vessels before and after opening the valve is maintained at 21.1°C. If the barometric pressure is 750 torr and the gas inside the sphere is oxygen, find the following: 1. The pressure at sphere B in psia. 2.. Temperature at sphere B in F. 3. The pressure of the gas when mixed in psia.
A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.)From previous experiments, this chemical reaction is known to absorb 386.kJ of energy. The temperature of the water bath is monitored, and it is determined from this data that 181.kJ of heat flows out of the system during the reaction.
A 5-mmdiameter hailstone has a terminal velocity of10.0m/s. Assuming its mass is6.031025 kg and all of its kinetic energy turns into heat, calculate the temperaturechangeof the hailstone when it hits the ground and stops. The heat capacity of ice is 2.06J/g.K.
Ethanol vapours were allowed to completely fill a jug with a volume of 18.9L. The ethanol was burned yielding 9.6mL of LIQUID water in the bottom of the jug. C2H5OH + 3 O2 ---> 2 CO2 + 3H20 If the room temperatue was 23.5 degrees Celsius and the pressure was 97.5 KpA, calculate the percentage yield of the water gathered in the jug. Select the final answer from the options below: - Not enough information - 76% - 24% - 17%