Problem: 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 D. 32J

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FREE Expert Solution

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:

E = q + w

ΔE = internal energy, J
q = heat, J
w = work, J


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Problem Details

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 

D. 32J

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Internal Energy concept. You can view video lessons to learn Internal Energy. Or if you need more Internal Energy practice, you can also practice Internal Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Fakhreddine's class at TEXAS.