Multiple Choice
A gas in a cylinder held at a constant pressure 1.80×105 Pa expands from a volume of 1.2 m3 to 1.6 m3. The internal energy of the gas decreases from 4.40×105 J to 3×105 J. How much heat was transferred to the gas?
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First Law of Thermodynamics
Multiple Choice
The internal energy of a system decreases by 500 J, and 230 J of work is done on the system. What is the heat transfer into or out of this system?
A
730 J
B
270 J
C
– 270 J
D
– 730 J
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