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Most Important Selected Qs for JEE AdvancedChemistryThermodynamics (C)

2 moles of an ideal monoatomic gas is taken from state A to state B through a process AB in which PT = constant. The process can be represented on a P-T graph as : Identify the correct statement(s).

Options

  1. AHeat evolved by the gas during the process A B=-2100 R
  2. BHeat absorbed by the gas during the process A B=+2100 R
  3. CU=-900 R
  4. DW=+1200 R

Correct answer

D. W=+1200 R

Step-by-step solution

aligned & PT = Constant & PV ^ 1 / 2 = Constant & W = P ₂ ~V ₂- P ₁ ~V ₁ x -1 = nR ( T ₂- T ₁ ) x -1 & = 2 R(300-600) (- 1 2 ) =+1200 R & U= nC _ v T =2 3 2 R(-300)=-900 R & Q = U - W =(-900-1200) R =-2100 R aligned

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