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cp255
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Homework Statement
For which process does the system absorb energy in the form of work?
a) Water Evaporates into steam.
b)Air is compressed by a bicycle pump.
c) Both
Homework Equations
The Attempt at a Solution
I though the answer was both. However, the key says the correct answer was just B. Why would it not be A as well? I thought evaporation required the input of energy.