Thermodynamics - Result Question 19
20. Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?
(a) $P^{\gamma} T^{1-\gamma}=$ constant
[NEET Kar. 2013]
(b) $P^{1-\gamma} T^{\gamma}=$ constant
(c) $P V^{\gamma}=$ constant
(d) $T V^{\gamma-1}=$ constant
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Answer:
Correct Answer: 20. (a)
Solution:
- (a) Adiabatic equations of state are $P V^{\gamma}=$ constant $\quad T V^{-1}=$ constant
$P^{1-\gamma} T^{\gamma}=$ constant.
When a thermodynamic system undergoes a change in such a way that to exchange of heat takes place between system and surroundings, then the process is adiabatic process. In this process $P, V$ and $T$ change but $\Delta Q=0$.
