Student Login

Home›Chapters›Thermodynamics PYQs›Thermodynamic Processes›Question 201

NEET 2020 (Phase 1) · Thermodynamic Processes

Thermodynamic Processes question from NEET 2020 (Phase 1)

Q201NEET 2020 · PHASE 1Easy

Thermodynamic Processes

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire systems is thermally insulated. The stop cock is suddenly opened. The Process is:

Show answer and solution

Answer: (a)

The whole system is thermally insulated, so $Q = 0$ : the process is adiabatic.
Gas expands into vacuum (free expansion), so $W = 0$ and $\Delta U = 0$ ; volume and pressure both change, so it is not isochoric or isobaric.
So the answer is (a) adiabatic.

Report a mistake

More questions on Thermodynamic Processes

Match the thermodynamic processes taking place in a system with the correct conditions…JEE Main 2020 (4 Sep, Shift 2)
A balloon filled with helium (32oC and 1.7 atm.) bursts. Immediately afterwards the…JEE Main 2020 (3 Sep, Shift 1)
To raise the temperature of a certain mass of gas by 50oC at a constant pressure, 160…JEE Main 2020 (3 Sep, Shift 2)
In an adiabatic process, the density of a diatomic gas becomes 32 times its initial…JEE Main 2020 (5 Sep, Shift 2)
A litre of dry air at STP expands adiabatically to a volume of 3 litres. If γ = 1.40, the…JEE Main 2020 (7 Jan, Shift 1)
An engine takes in 5 moles of air at 20oC and 1 atm, and compresses it adiabatically to…JEE Main 2020 (2 Sep, Shift 1)
A monoatomic gas of pressure p having volume V expands isothermally to a volume 2V and…MHT CET 2020 (16 Oct, Shift 1)
A diatomic gas undergoes adiabatic change. Its pressure p and temperature T are related…MHT CET 2020 (16 Oct, Shift 2)