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What is the change in internal energy Well, were going to use the First Law. It says 60 joules of work is done on a gas so thats work done on the gas.
2500 Solved Problems In Thermodynamics Plus The Work
So 60 joules has to be positive, and so this is plus the work. But why do we care Why do we care about the change in internal energy of the gas Well heres something important. This means if the temperature goes up, the internal energy goes up.