We are being asked to calculate the internal energy of the system.
The internal energy (ΔE or ΔU) of a system can be calculated from the heat and work of the system. The relationship between internal energy, heat, and work is shown in the following equation:
ΔE = internal energy, J
q = heat, J
w = work, J
The change in internal energy of a system made of 8 g of water vapor receiving 775 J of heat and delivering 525 J of work on the surroundings is:
A. 300 J
B. 250 J
C. 250 kJ
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