Which of the following cannot determine the state of a thermodynamic system?

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Important Questions on Thermodynamics

HARD

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 2

The radius and surface tension of a spherical soap bubble be

r

and

T

respectively. Find the charge required which is to be given to the bubble so that its radius will become

2 r

in equilibrium. Here atmospheric pressure is

P_{0},

temperature of the air inside the bubble remains constant & the charge is assumed to uniformly distributed on the surface of the bubble. Find the value of

\frac{Q}{96 π \times 10^{- 10}}

(in

C

). Take

P_{0} = 10^{2} Pa, T = 0.07 N m^{- 1}, r = 1 cm, ε_{0} = 9 \times 10^{- 12} C^{2} N m^{- 2} .

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 3

Find the amount of work done to increase the temperature of one mole of ideal gas by

30 ° C

, if it is expanding under the condition

V \propto T^{\frac{2}{3}}

.

(R = 8 .31 J {mol}^{- 1} K^{- 1})

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 4

A gas for which

γ = \frac{5}{3}

is heated at constant pressure. The percentage of total heat given that will be used for external work is

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 5

If ideal diatomic gas follows the process as shown in graph where $T$ is temperature in $kelvin$ and $V$ is volume $(m^{3})$ , then molar heat capacity for this process will be [in terms of gas constant $R$ ],

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