An ideal monoatomic gas is taken through the thermodynamic states $A \to B \to C \to D$ via the paths shown in the figure. If $U_A, U_B, U_C$ and $U_D$ represent the internal energy of the gas in state $A, B\, C$ and $D$ respectively, then which of the following is not true?
  • A$U_A -U_D = 0$
  • B$U_B -U_C = 0$
  • C$U_C -U_D > 0$
  • D$U_B -U_A < 0$
Medium
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