Home
Class 11
PHYSICS
An ideal gas undergoes isothermal proces...

An ideal gas undergoes isothermal process from some initial state i to final state f. Choose the correct alternatives.

A

dU=0

B

dQ=0

C

dQ=dU

D

dQ=dW

Text Solution

Verified by Experts

The correct Answer is:
A, D
There is no change in isothermal process,
`therefore` dT=0
`therefore` T=constant
Now change in internal energy of an ideal gas,
`dU=nC_V dT`
`therefore dU=0` [ `because` dT=0] verifies option (A)
From first law of thermodynamics ,
dQ=dU+dW
`therefore` dQ=0+dW
`therefore` dQ=dW, which verifies option (D)
Promotional Banner

Topper's Solved these Questions

  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Section-D Ncert Exemplar Solution (Very Short Answer )|5 Videos

  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Section-D Ncert Exemplar Solution (Short Answer )|6 Videos

  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Section-D Ncert Exemplar Solution (MCQs)|6 Videos

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Question Paper (Section - D) (Answer following in brief :) Each carry 4 marks|1 Videos

  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise Section -F (Questions from Module )|20 Videos

Similar Questions

Explore conceptually related problems

An ideal gas undergoes four different processes from the same initial state as shown in figure of P-V diagram. Four processes are adiabatic, isothermal, isobaric and isochoric. Out of 1,2,3 and 4 which one is adiabatic ?

For isothermal process of an ideal gas (dP)/P = _____

Suppose 0.5 moles of an ideal gas undergoes an isothermal expansion as energy is added to it as heat Q. graph shows the final volume V_(f) versus Q. the temperature of the gas is (use In 9 = 2 and R = (25)/(3) J//mol-K)

Suppose 0.5 moles of an ideal gas undergoes an isothermal expansion as energy is added to it as heat Q. graph shows the final volume V_(f) versus Q. the temperature of the gas is (use In 3 = 1 and R = (25)/(3) J//mol-K)

A system is taken along different path in the graph of P to V from its initial state to final state. Which of following quantity does not depend on the path of the system ?

n' moles of an ideal gas undergoes a process AtoB as shown in the figure. The maximum temperature of the gas during the process will be:

A gas is enclosed in a cylinder with a movable frictionless piston. Its initial thermodynamic state at pressure P_i=10^5 Pa and volume V_i=10^-3m^3 changes to a final state at P_f=(1//32)xx10^5Pa and V_f=8xx10^-3m^3 in an adiabatic quasi-static process, such that P^3V^3=constant. Consider another thermodynamic process that brings the system form the same initial state to the same final state in two steps: an isobaric expansion at P_i followed by an isochoric (isovolumetric ) process at volume V_r. The amount of heat supplied to the system i the two-step process is approximately

Some of the thermodynamic parameters are state variables while some are process variables. Some grouping of the parameters are given. Choose the correct one.