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Which process involves the expansion and contraction of rocks due to temperature changes?

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Important Questions on Thermodynamics

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

For a sample of perfect gas, when its pressure is changed isothermally from

p_{i}

p_{f}

, the entropy change is given by

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

A rod, of length

L

at room temperature and uniform area of cross section

A,

is made of a metal having coefficient of linear expansion

α / ° C

It is observed that an external compressive force

F

is applied on each of its ends, prevents any change in the length of the rod when its temperature rises by

∆ T K

Young's modulus,

Y

for this metal is:

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

For the given cyclic process $C A B$ as shown for a gas, the work done is:

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EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

A copper rod of

88 c m

and an aluminum rod of unknown length have their increase in length independent of increase in temperature. The length of aluminum rod is

(α_{C u} = 1.7 \times 10^{- 5} K^{- 1} a n d α_{Al} = 2.2 \times 10^{- 5} K^{- 1})

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

In an experiment, a sphere of aluminium of mass

0.20 kg

is heated up to

150 ° C

. Immediately, it is put into water of volume

150 cc

27^{o} C

kept in a calorimeter of water equivalent to

0.025 kg

. The final temperature of the system is

40^{o} C

. The specific heat of the aluminium is(take

4.2 Joule = 1 calorie

)

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

Two systems are in thermal equilibrium. The quantity which is common for them is

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

An ideal gas is expanding such that

P T =

constant. The coefficient of volume expansion of the gas is

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

In which case change in entropy is negative?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

n

moles of an ideal gas with constant volume heat capacity

C_{v}

undergo an isobaric expansion by certain volume. The ratio of the work done in the process, to the heat supplied is:

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

During adiabatic expansion of 10 moles of a gas, the internal energy decreases by 50J. Work done during the process is

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

Heat is supplied to a diatomic gas at constant pressure. The ratio of

∆ Q : ∆ U : ∆ W

HARD

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

One mole of a monoatomic ideal gas undergoes a quasistatic process, which is depicted by a straight line joining points

(v_{0}, T_{0})

and

(2 v_{0}, 3 T_{0})

in a

v - T

diagram. What is the value of the heat capacity of the gas at the point

(v_{0}, T_{0})

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

One mole of an ideal gas

(C_{V} = 20 J K^{- 1} m o l^{- 1})

initially at STP is heated at constant volume to twice the initial temperature. For the process, W and q will be :

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

The molar specific heat of oxygen at constant pressure

C_{P} = 7.03 cal {mol}^{- 1} ° C^{- 1}

and

R = 8.31 J {mol}^{- 1} ° C^{- 1}

. The amount of heat taken by

5 mol

of oxygen when heated at constant volume from

10 ° C

20 ° C

will be approximately

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

A diatomic ideal gas is heated at constant volume until the pressure is doubled and again heated at constant pressure until the volume is doubled. The average molar heat capacity for the whole process is

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

d U

represents the increase in internal energy of a thermodynamic system and

d W

the work done by the system. Which of the following statement is true?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

12g of gas occupy a volume of 4 x 10^-3m³ at a temperature of 7^oC. After the gas is heated at constant pressure, its density becomes 6 x 10^-4 g/cm³. What is the temperature to which the gas was heated?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

Heat energy absorbed by a system in going through a cyclic process shown in diagram.

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MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

A gas is compressed from a volume of

2 m^{3}

to a volume of

1 m^{3}

at a constant pressure of

100 N m^{2}

. Then it is heated at constant volume by supplying

150 J

of energy. As a result, the internal energy of the gas

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Reversible and Irreversible Processes

During the adiabatic expansion of 2 moles of a gas, change in internal energy was found to be equal to 100 J. Work done in the process will be equal to

Which process involves the expansion and contraction of rocks due to temperature changes?

Important Questions on Thermodynamics

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