Question

A certain amount of heat is added to a closed system. A few moments later, a...

A certain amount of heat is added to a closed system. A few moments later, a scientist observes that the total increase in energy is less than that heat energy added to the system. What could be an explanation for this conclusion?

a) external forces are acting upon the system

b) the system is not actually closed

c) the measuring tools were incorrectly calibrated

d) work was done by the system

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Answer #1

Solution:-

Heat added to a system can be used in only two possible ways by the system. Either system can increase their internal energy or can do work or both. So here in this problem what are the possibility? Let's see...

## As the heat added to the system is not completely used to increase the internal energy so there is only one more possibility where energy can go and that is the work done by the system on the surrounding.

Answer: Option (d)

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