Problem: Calculate the change in internal energy (ΔE) for a system that is giving off 25.0 kJ of heat and is changing from 12.00 L to 6.00 L in volume at 1.50 atm pressure.a. +25.9 kJb. -16.0 kJc. -25.9 kJd. -24.1 kJe. 937 kJ

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We are being asked to calculate the internal energy of a system that is giving off 25.0 kJ of heat and is changing from 12.00 L to 6.00 L in volume at 1.50 atm pressure.


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:


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Problem Details

Calculate the change in internal energy (ΔE) for a system that is giving off 25.0 kJ of heat and is changing from 12.00 L to 6.00 L in volume at 1.50 atm pressure.

a. +25.9 kJ

b. -16.0 kJ

c. -25.9 kJ

d. -24.1 kJ

e. 937 kJ

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