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The work done to compress a gas is 74 J. As a result, 26 J of heat is given off to the surroundings. Calculate the change in energy of the gas.

The work done to compress a gas is 74 J. As a result, 26 J of heat is given off to the surroundings. Calculate the change in energy of the gas.

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.92QE: What mass of acetylene, C2H2(g), must be burned to produce 3420 kJ of heat, given that its enthalpy...
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y=40

8) The work done to compress a gas is 74 J. As a result, 26 J of heat is given off to the surroundings. Calculate the change in energy of the gas. 9) Determine the amount of heat (in kJ) given off when Y x 104 g of NO2 are produced according to the equation: 2NO(g) + O2(g) → 2NO2(g) AH = -114.6 kJ 10) A sheet of gold weighing Y g and at a temperature of 18.0°C is placed flat on a sheet of iron weighing 20.0 g and at a temperature of 55.6°C. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings.
Transcribed Image Text:8) The work done to compress a gas is 74 J. As a result, 26 J of heat is given off to the surroundings. Calculate the change in energy of the gas. 9) Determine the amount of heat (in kJ) given off when Y x 104 g of NO2 are produced according to the equation: 2NO(g) + O2(g) → 2NO2(g) AH = -114.6 kJ 10) A sheet of gold weighing Y g and at a temperature of 18.0°C is placed flat on a sheet of iron weighing 20.0 g and at a temperature of 55.6°C. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings.
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