QBManager

Thermodynamics

148116 If $Δ Q$ and $Δ W$ represent the heat supplied to the system and the work done on the system respectively, then the first law of thermodynamics can be written as

1

Δ Q = Δ U + Δ W

2

Δ Q = Δ U - Δ W

3

Δ Q = Δ W - Δ U

4

Δ Q = - Δ W - Δ U

Explanation:

B Heat supplied to the system $= + Δ Q$
Work done on the system $= - Δ W$
According to the first law of thermodynamics $Δ Q = Δ U - Δ W$

AIIMS-2013

Thermodynamics

148119 An ideal gas is taken through a cyclic thermo dynamical process through four steps. The amounts of heat involved in these steps are $Q_{1} =$ $5960 J, Q_{2} = - 5585 J, Q_{3} = - 2980 J$ and $Q_{4} =$ $3645 J$ , respectively. The corresponding works involved are $W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = -$ $1100 J$ and $W_{4}$ , respectively. The value of $W_{4}$ is-

1

1315 J

2

275 J

3

765 J

4

675 J

Explanation:

C For cyclic thermodynamic process $\oint Q = \oint W$
$Q_{1} + Q_{2} + Q_{3} + Q_{4} = W_{1} + W_{2} + W_{3} + W_{4}$
$5960 + (- 5585) + (- 2980) + 3645 = 2200 + (- 825) +$
$1040 = 275 - W_{4}$
$W_{4} = 1040 - 275 = 765 J$

BCECE-2017

Thermodynamics

148121 If $150 J$ of heat is added to a system and the work done by the system is $110 J$ , then change in internal energy will be -

1

40 J

2

110 J

3

150 J

4

260 J

Explanation:

A Given that, $Δ Q = 150 J$ , work done by the system $(W) = 110 J$
We know that, $Δ Q = Δ U + Δ W$
$Δ U = Δ Q - Δ W$
$= 150 - 110 = 40 J$

BCECE-2007

Thermodynamics

148128 Consider the following statements:
Statement I: A thermally insulated vessel contains some water. If the vessel is shaken vigorously, the temperature of the water will rise.
Statement II: In this process energy is given to the water.
Which one of the following is correct with reference to the above statements?

1 Both statements I and statement II are true and statement II is the correct explanation of statement I

2 Both statements I and statement II are true and statement II is not the correct explanation of statement I

3 Statement I is true and statement II is false

4 Both statements I and statement II are false

SCRA-2010

Thermodynamics

148116 If $Δ Q$ and $Δ W$ represent the heat supplied to the system and the work done on the system respectively, then the first law of thermodynamics can be written as

1

Δ Q = Δ U + Δ W

2

Δ Q = Δ U - Δ W

3

Δ Q = Δ W - Δ U

4

Δ Q = - Δ W - Δ U

Explanation:

B Heat supplied to the system $= + Δ Q$
Work done on the system $= - Δ W$
According to the first law of thermodynamics $Δ Q = Δ U - Δ W$

AIIMS-2013

Thermodynamics

148119 An ideal gas is taken through a cyclic thermo dynamical process through four steps. The amounts of heat involved in these steps are $Q_{1} =$ $5960 J, Q_{2} = - 5585 J, Q_{3} = - 2980 J$ and $Q_{4} =$ $3645 J$ , respectively. The corresponding works involved are $W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = -$ $1100 J$ and $W_{4}$ , respectively. The value of $W_{4}$ is-

1

1315 J

2

275 J

3

765 J

4

675 J

Explanation:

C For cyclic thermodynamic process $\oint Q = \oint W$
$Q_{1} + Q_{2} + Q_{3} + Q_{4} = W_{1} + W_{2} + W_{3} + W_{4}$
$5960 + (- 5585) + (- 2980) + 3645 = 2200 + (- 825) +$
$1040 = 275 - W_{4}$
$W_{4} = 1040 - 275 = 765 J$

BCECE-2017

Thermodynamics

148121 If $150 J$ of heat is added to a system and the work done by the system is $110 J$ , then change in internal energy will be -

1

40 J

2

110 J

3

150 J

4

260 J

Explanation:

A Given that, $Δ Q = 150 J$ , work done by the system $(W) = 110 J$
We know that, $Δ Q = Δ U + Δ W$
$Δ U = Δ Q - Δ W$
$= 150 - 110 = 40 J$

BCECE-2007

Thermodynamics

148128 Consider the following statements:
Statement I: A thermally insulated vessel contains some water. If the vessel is shaken vigorously, the temperature of the water will rise.
Statement II: In this process energy is given to the water.
Which one of the following is correct with reference to the above statements?

1 Both statements I and statement II are true and statement II is the correct explanation of statement I

2 Both statements I and statement II are true and statement II is not the correct explanation of statement I

3 Statement I is true and statement II is false

4 Both statements I and statement II are false

SCRA-2010

Thermodynamics

148116 If $Δ Q$ and $Δ W$ represent the heat supplied to the system and the work done on the system respectively, then the first law of thermodynamics can be written as

1

Δ Q = Δ U + Δ W

2

Δ Q = Δ U - Δ W

3

Δ Q = Δ W - Δ U

4

Δ Q = - Δ W - Δ U

Explanation:

B Heat supplied to the system $= + Δ Q$
Work done on the system $= - Δ W$
According to the first law of thermodynamics $Δ Q = Δ U - Δ W$

AIIMS-2013

Thermodynamics

148119 An ideal gas is taken through a cyclic thermo dynamical process through four steps. The amounts of heat involved in these steps are $Q_{1} =$ $5960 J, Q_{2} = - 5585 J, Q_{3} = - 2980 J$ and $Q_{4} =$ $3645 J$ , respectively. The corresponding works involved are $W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = -$ $1100 J$ and $W_{4}$ , respectively. The value of $W_{4}$ is-

1

1315 J

2

275 J

3

765 J

4

675 J

Explanation:

C For cyclic thermodynamic process $\oint Q = \oint W$
$Q_{1} + Q_{2} + Q_{3} + Q_{4} = W_{1} + W_{2} + W_{3} + W_{4}$
$5960 + (- 5585) + (- 2980) + 3645 = 2200 + (- 825) +$
$1040 = 275 - W_{4}$
$W_{4} = 1040 - 275 = 765 J$

BCECE-2017

Thermodynamics

148121 If $150 J$ of heat is added to a system and the work done by the system is $110 J$ , then change in internal energy will be -

1

40 J

2

110 J

3

150 J

4

260 J

Explanation:

A Given that, $Δ Q = 150 J$ , work done by the system $(W) = 110 J$
We know that, $Δ Q = Δ U + Δ W$
$Δ U = Δ Q - Δ W$
$= 150 - 110 = 40 J$

BCECE-2007

Thermodynamics

148128 Consider the following statements:
Statement I: A thermally insulated vessel contains some water. If the vessel is shaken vigorously, the temperature of the water will rise.
Statement II: In this process energy is given to the water.
Which one of the following is correct with reference to the above statements?

1 Both statements I and statement II are true and statement II is the correct explanation of statement I

2 Both statements I and statement II are true and statement II is not the correct explanation of statement I

3 Statement I is true and statement II is false

4 Both statements I and statement II are false

SCRA-2010

Thermodynamics

148116 If $Δ Q$ and $Δ W$ represent the heat supplied to the system and the work done on the system respectively, then the first law of thermodynamics can be written as

1

Δ Q = Δ U + Δ W

2

Δ Q = Δ U - Δ W

3

Δ Q = Δ W - Δ U

4

Δ Q = - Δ W - Δ U

Explanation:

B Heat supplied to the system $= + Δ Q$
Work done on the system $= - Δ W$
According to the first law of thermodynamics $Δ Q = Δ U - Δ W$

AIIMS-2013

Thermodynamics

148119 An ideal gas is taken through a cyclic thermo dynamical process through four steps. The amounts of heat involved in these steps are $Q_{1} =$ $5960 J, Q_{2} = - 5585 J, Q_{3} = - 2980 J$ and $Q_{4} =$ $3645 J$ , respectively. The corresponding works involved are $W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = -$ $1100 J$ and $W_{4}$ , respectively. The value of $W_{4}$ is-

1

1315 J

2

275 J

3

765 J

4

675 J

Explanation:

C For cyclic thermodynamic process $\oint Q = \oint W$
$Q_{1} + Q_{2} + Q_{3} + Q_{4} = W_{1} + W_{2} + W_{3} + W_{4}$
$5960 + (- 5585) + (- 2980) + 3645 = 2200 + (- 825) +$
$1040 = 275 - W_{4}$
$W_{4} = 1040 - 275 = 765 J$

BCECE-2017

Thermodynamics

148121 If $150 J$ of heat is added to a system and the work done by the system is $110 J$ , then change in internal energy will be -

1

40 J

2

110 J

3

150 J

4

260 J

Explanation:

A Given that, $Δ Q = 150 J$ , work done by the system $(W) = 110 J$
We know that, $Δ Q = Δ U + Δ W$
$Δ U = Δ Q - Δ W$
$= 150 - 110 = 40 J$

BCECE-2007

Thermodynamics

148128 Consider the following statements:
Statement I: A thermally insulated vessel contains some water. If the vessel is shaken vigorously, the temperature of the water will rise.
Statement II: In this process energy is given to the water.
Which one of the following is correct with reference to the above statements?

1 Both statements I and statement II are true and statement II is the correct explanation of statement I

2 Both statements I and statement II are true and statement II is not the correct explanation of statement I

3 Statement I is true and statement II is false

4 Both statements I and statement II are false

SCRA-2010

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Question Bank Series