An ideal gas ( γ = 1.5 ) at point a has T = 800 K, P = 27 atm, V = 1 litre. Process ab takes it to V b = 9 litre and process a c takes it to the same pressure as b . One of ab , a c is adiabatic and

Question

An ideal gas ( γ = 1.5 ) at point a has T = 800 K, P = 27 atm, V = 1 litre. Process ab takes it to V b ​ = 9 litre and process a c takes it to the same pressure as b . One of ab , a c is adiabatic and the other isothermal, and b lies at the smaller volume. Which statements are correct?

TestHub · Accepted Answer

The adiabat is steeper, so ab is adiabatic and a c isothermal. P b ​ = 27 × 9 − 1.5 = 1 atm and T b ​ = 800 × 9 − 0.5 = 266.7 K. T c ​ = 800 K and P c ​ = 1 atm, so V c ​ = 27 litre. D (18 litre) is wrong.

Physics - Heat & Thermo Question with Solution | TestHub

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