An ideal gas is taken from state- 1 to state- 2 through optional path A ,   B ,   C and D as shown…

An ideal gas is taken from state-1 to state-2 through optional path A, B, C and D as shown in the P-V diagram. Let Q, W and U represent the heat supplied, work done and change internal energy respectively, then

  1. QA-QD=WA-WD
  2. QB-WB>QC-WC
  3. WA<WB<WC<WD
  4. QA<QB<QC<QD

Solution

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body's state, called internal energy.

Asked in: AP EAMCET 2021 (20 Aug Shift 2)

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