JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume non -expansion work is zero)
- A Isochoric process: \(\Delta U = q\)
- B Adiabatic process: \(\Delta U = - w\)
- C Cyclic process: \(q = -w\)
- D Isothermal process: \(q = -w\)
Answer & Solution
Correct Answer
(B) Adiabatic process: \(\Delta U = - w\)
Step-by-step Solution
Detailed explanation
According to the first law of thermodynamics \(q=\Delta U-w\) For cyclic process : \(\Delta U = 0 \Rightarrow q = - w\) For isothermal process : \(\Delta U = 0 \Rightarrow q = - w\) For adiabatic process : \(q = 0 \Rightarrow \Delta U = W\) For isochoric process :…
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