Question

how to calculate internal energy of gases? ​

Answer 1

internal energy of gases can be calculated by using in the equation ΔU=q+w w=0 and ΔU=q. 

The internal energy is equal to the heat of the system........

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Answer 2

Explanation:

Since the system has constant volume (ΔV=0) the term -PΔV=0 and work is equal to zero. Thus, in the equation ΔU=q+w w=0 and ΔU=q. The internal energy is equal to the heat of the system. The surrounding heat increases, so the heat of the system decreases because heat is not created nor destroyed