EASY

Earn 100

What is the primary agent of mechanical weathering?

50% studentsanswered this correctly

Important Questions on Thermodynamics

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

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})

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

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:

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

A monoatomic gas of mass

4.0 u

is kept in an insulated container. The container is moving with velocity

30 m s^{- 1}

. If the container is suddenly stopped then a change in temperature of the gas (

R =

gas constant) is

\frac{x}{3 R}

. Value of

x

is,

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

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>Heat, Internal Energy and Work

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

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

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>Heat, Internal Energy and Work

2 kg

of a monoatomic gas is at a pressure of

4 \times 10^{4} N m^{- 2}

. The density of the gas is

8 kg m^{- 3}

. What is the order of energy of the gas due to its thermal motion?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

Internal energy is sum of

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

Starting with the same initial conditions, an ideal gas expands from volume $V_{1}$ to $V_{2}$ in three different ways. The work done by the gas is $W_{1}$ if the process is purely isothermal, $W_{2}$ if purely isobaric and purely adiabatic. Then
Question Image

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

Among the following statements, the correct statement is

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

An electric heater supplies heat to a system at a rate of 100 W. If the system performs work at a rate of 75 joules per second, at what rate is the internal energy increasing?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

For the reaction (at

1240 K

and

1

atm.)

C a C O_{3} (s) \to C a O (s) + C O_{2} (g)

∆ H = 176

kJ/mol;

∆ E

will be

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

A cyclic process ABCD is shown in the following P-V diagram. Which of the following curves represents the same process?

Question Image

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

If gas expands at constant temperature and pressure, then its

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

The final volume of a system is equal to the initial volume in a certain process. Is the work done by the system necessarily zero? Is it necessarily nonzero?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

In the figure, a certain mass of gas traces three paths

1, 2, 3

from state

A

to state

B

. If work done by the gas along three paths are

W_{1}, W_{2}, W_{3}

respectively, then
Question Image

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

The outer surface of a cylinder containing a gas is rubbed vigorously by a polishing machine. The cylinder and its gas become warm. Is the energy transferred to the gas heat or work?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

Which one of the following statements is true, in respect of the usual quantities represented by

∆ Q, ∆ U

and

∆ W.

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

Among the following gases, the one which possesses the largest internal energy is

EASY

Physics>Heat and Thermodynamics>Thermodynamics>Heat, Internal Energy and Work

An ideal gas is taken around the cycle $A B C A$ as shown in the $p V$ diagram

Question Image

The total work done by the gas during the cycle is

What is the primary agent of mechanical weathering?

Important Questions on Thermodynamics

Learn and Prepare for any exam you want !