Isothermal versus adiabatic change: compare the final pressures
This type of question, asked 9 times: 3 May 2023 S1, 10 May 2023 S1, 11 May 2023 S1, 11 May 2024 S1, 19 Apr 2025 S1, 11 Apr 2026 S1, 16 Apr 2026 S1, 18 Apr 2026 S2, 20 Apr 2026 S2. All 9 questions below, oldest first.
Try each one first, then open its answer.
Question 1
3 May 2023 S1
20There are two samples A and B of a certain gas, initially at the same temperature and pressure. Both are compressed from volume to . Sample A is compressed isothermally while sample B is compressed adiabatically. The final pressure of A isTap an option to check your answer.
Question 2
10 May 2023 S1
37Initial pressure and volume of a gas are 'P' and 'V' respectively. First its volume is expanded to '4V' by isothermal process and then again its volume is reduced to 'V' by adiabatic process; then its final pressure ifTap an option to check your answer.
Question 3
11 May 2023 S1
19Two gases A and B having same initial state (P,V,n,T). Now gas A is compressed to by isothermal process and other gas B is compressed to by adiabatic process. The ratio of final pressure of gas A and B is (Both gases are monoatomic, )Tap an option to check your answer.
Question 4
11 May 2024 S1
37A monoatomic gas at pressure P, having volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is (Take )Tap an option to check your answer.
Question 5
19 Apr 2025 S1
13Three samples , and Z of same gas have equal volumes and temperatures. The volume of each sample is doubled, the process being isothermal for X , adiabatic for Y and isobaric for Z . If the final pressures are equal for the three samples, the ratio of the initial pressures is ( / 2)Tap an option to check your answer.
Question 6
11 Apr 2026 S1
116Two samples A and B of gas initially at the same pressure and temperature. They are compressed from volume to (A isothermally and B adiabatically). The relation between pressure of the gas A and pressure of gas B isTap an option to check your answer.
Question 7
16 Apr 2026 S1
117A monoatomic gas at pressure P having volume V expands isothermally to a volume 3V and then adiabatically to a volume 81 V. The final pressure of the gas is .Tap an option to check your answer.
Question 8
18 Apr 2026 S2
115An ideal gas with pressure P, volume V and temperature T is expanded isothermally to volume 2V and a final pressure . The same gas is expanded adiabatically to a volume 2V then the final pressure is . In terms of , the ratio of the two specific heats for the gas, the ratio isTap an option to check your answer.
Question 9
20 Apr 2026 S2
117An ideal gas having pressure , volume and temperature is expanded isothermally, to a volume and final pressure . The same gas is expanded adiabatically to a volume , the final pressure being . The ratio isTap an option to check your answer.