The p-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from $A \rightarrow B \rightarrow C$ is 30 J, and 40 J heat is given to the system. The change in internal energy between A and C is

Question

Dr. Abubacker · Accepted Answer

(a) Since, work is done by the system, so it is positive. Therefore,
$\mathrm{\Delta}W = 30J$
Heat given to the system,
$\mathrm{\Delta}Q = 40J$
According to first law of thermodynamics, change in internal energy is given by
$\mathrm{\Delta}U = \mathrm{\Delta}Q - \mathrm{\Delta}W$
$= 43 - 30 = 10\ J$

Q. The p-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from $A \rightarrow B \rightarrow C$ is 30 J, and 40 J heat is given to the system. The change in internal energy between A and C is

Explanation

Reviewed by Dr. Abubacker

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