You are studying compression of a gas by piston in an isolated system, which has adiabatic...
You are studying compression of a gas by piston in an isolated system, which has adiabatic walls. What is the sign of q, w, and ΔU for this process?
Homework Answers
for Adiabatic container.
Q=0
and as we know
Q+W=
U
for compression W=-PdV , Here dV=V2-V1 which is -ve and hence PdV is -ve and overall work done is Positive.
as Q=0 therefore W=U
and Work done is +ve and therefore Change in internal energy is
also positive.
So sign of Q=0, W=+ve,
U=+ve.
Thank you
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