A diatomic gas, having Cp = 7/2R and Cv = 5/2R, is heated at constant pressure. The ratio dU: dQ: dW: (a) 5: 7: 3 (b) 3: 7: 2 (c) 5: 7: 2 (d) 3: 5: 2

Answer: (c). At constant pressure: dU = nCv dT, dQ = nCp dT, dW = nR dT. dU: dQ: dW = 5/2R: 7/2R: R = 5: 7: 2 So the answer is (c) 5: 7: 2.

A diatomic gas, having Cp = 7/2R and Cv = 5/2R, is heated at constant… | JEE Main 2021 (25 Feb, Shift 1)

Q177JEE Main 2021 · 25 FEB · SHIFT 1Easy

Thermodynamic Processes

A diatomic gas, having $C_p = \frac{7}{2}R$ and $C_v = \frac{5}{2}R$ , is heated at constant pressure. The ratio dU: dQ: dW:

Show answer and solution

Answer: (c)

If the pressure of an ideal gas is decreased by 10% isothermally, then its volume willMHT CET 2021 (22 Sep, Shift 2)
A perfect gas of volume 10 litre n compressed isothermally to a volume of 1 litre. The…MHT CET 2021 (20 Sep, Shift 2)
For a monoatomic gas, the work done at constant pressure is ' W '. The heat supplied at…MHT CET 2021 (24 Sep, Shift 1)
The change in internal energy of the mass of a gas, when the volume changes from ' V ' to…MHT CET 2021 (22 Sep, Shift 2)
For a monoatomic gas, work done at constant pressure is W. The heat supplied at constant…MHT CET 2021 (20 Sep, Shift 1)
A monoatomic gas is suddenly compressed to (1/8) th of its initial volume adiabatically…MHT CET 2021 (24 Sep, Shift 2)
An ideal gas at pressure ' p ' is adiabatically compressed so that its density becomes…MHT CET 2021 (23 Sep, Shift 1)
An ideal gas at 27 is compressed adiabatically to (8/27) of its original volume. If ratio…MHT CET 2021 (22 Sep, Shift 2)