A thermodynamic process is the pressure and volumes corresponding to some points in the figure are, $P_A = 3 \times 10^4 Pa$, $V_A = 2 \times 10^{-3}\, m^3$, $P_B = 8 \times 10^4 Pa$, $V_D = 5 \times 10^{-3}\,m^3$. In process $AB, 600\, J$ of heat and in process $BC, 200\, J$ of heat is added to the system. The change in the internal energy in process $AC$ would be .... $J$
A$560$
B$800$
C$600$
D$640$
Medium
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A$560$
a $\Delta \mathrm{U}_{\mathrm{AC}}=\Delta \mathrm{U}_{\mathrm{AC}}+\mathrm{W}_{\mathrm{AC}}$
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Avessel with open mouth contains air at $60^oC$. When the vessel is heated upto temperature $T$, one fourth of the air goes out. The value of $T$ is ..... $^oC$
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