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Question: Calculate the change in internal energy of the system if 37.6 J of work is done by the system with h...

Calculate the change in internal energy of the system if 37.6 J of work is done by the system with heat loss of 14.6 J

A

-23.0

B

-12.57

C

-549

D

-52.2

Answer

-52.2

Explanation

Solution

Using the first law of thermodynamics,

ΔU=Q−W\Delta U = Q - W

where

Q=−14.6 JQ = -14.6 \, \text{J} (heat loss) and W=37.6 JW = 37.6 \, \text{J} (work done by the system).

Thus,

ΔU=−14.6 J−37.6 J=−52.2 J\Delta U = -14.6 \, \text{J} - 37.6 \, \text{J} = -52.2 \, \text{J}