01. First Law of Thermodynamics and Application
Thermodynamics

272726 Work done by 1 mole of an ideal gas for its adiabatic reversible change when temperature attains $T_2$ from $T_1$ is'

1 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}\right)\left(\mathrm{T}_2-\mathrm{T}_1\right)$
2 $\mathrm{C}_{\mathrm{p}}\left(\mathrm{T}_1-\mathrm{T}_2\right)$
3 $\mathrm{C}_{\mathrm{V}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{V}}\right)\left(\mathrm{T}_1+\mathrm{T}_2\right)$
Thermodynamics

272654 The work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of $1 \mathrm{~L}$ to $10 \mathrm{~L}$ at $300 \mathrm{~K}$ is
$\left(\mathrm{R}=0.0083 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

1 $0.115 \mathrm{~kJ}$
2 $58.5 \mathrm{~kJ}$
3 $11.5 \mathrm{~kJ}$
4 $5.8 \mathrm{~kJ}$
Thermodynamics

272658 Work done by an ideal gas at a constant volume is ......... .

1 $-\frac{\Delta \mathrm{p}}{\mathrm{p}}$
2 $-\mathrm{V} \Delta \mathrm{p}$
3 0
4 $\frac{\mathrm{nR}}{\mathrm{p}}$
Thermodynamics

272659 A system undergoes a process in which $\Delta \mathrm{U}=+300 \mathrm{~J}$ while absorbing $400 \mathrm{~J}$ of heat energy and undergoing an expansion against 0.5 bar. What is the change in volume (in L)?

1 4
2 5
3 2
4 3
Thermodynamics

272661 One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at $300 \mathrm{~K}$. $\Delta \mathrm{u}, \mathrm{q}$ and work done in the process are $\left[\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

1 $0,1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
2 $0,17.48 \mathrm{~J}, 1.726 \mathrm{~J}$
3 $0,21.84 \mathrm{~kJ}, 21.84 \mathrm{~kJ}$
4 none of these.
Thermodynamics

272726 Work done by 1 mole of an ideal gas for its adiabatic reversible change when temperature attains $T_2$ from $T_1$ is'

1 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}\right)\left(\mathrm{T}_2-\mathrm{T}_1\right)$
2 $\mathrm{C}_{\mathrm{p}}\left(\mathrm{T}_1-\mathrm{T}_2\right)$
3 $\mathrm{C}_{\mathrm{V}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{V}}\right)\left(\mathrm{T}_1+\mathrm{T}_2\right)$
Thermodynamics

272654 The work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of $1 \mathrm{~L}$ to $10 \mathrm{~L}$ at $300 \mathrm{~K}$ is
$\left(\mathrm{R}=0.0083 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

1 $0.115 \mathrm{~kJ}$
2 $58.5 \mathrm{~kJ}$
3 $11.5 \mathrm{~kJ}$
4 $5.8 \mathrm{~kJ}$
Thermodynamics

272658 Work done by an ideal gas at a constant volume is ......... .

1 $-\frac{\Delta \mathrm{p}}{\mathrm{p}}$
2 $-\mathrm{V} \Delta \mathrm{p}$
3 0
4 $\frac{\mathrm{nR}}{\mathrm{p}}$
Thermodynamics

272659 A system undergoes a process in which $\Delta \mathrm{U}=+300 \mathrm{~J}$ while absorbing $400 \mathrm{~J}$ of heat energy and undergoing an expansion against 0.5 bar. What is the change in volume (in L)?

1 4
2 5
3 2
4 3
Thermodynamics

272661 One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at $300 \mathrm{~K}$. $\Delta \mathrm{u}, \mathrm{q}$ and work done in the process are $\left[\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

1 $0,1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
2 $0,17.48 \mathrm{~J}, 1.726 \mathrm{~J}$
3 $0,21.84 \mathrm{~kJ}, 21.84 \mathrm{~kJ}$
4 none of these.
Thermodynamics

272726 Work done by 1 mole of an ideal gas for its adiabatic reversible change when temperature attains $T_2$ from $T_1$ is'

1 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}\right)\left(\mathrm{T}_2-\mathrm{T}_1\right)$
2 $\mathrm{C}_{\mathrm{p}}\left(\mathrm{T}_1-\mathrm{T}_2\right)$
3 $\mathrm{C}_{\mathrm{V}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{V}}\right)\left(\mathrm{T}_1+\mathrm{T}_2\right)$
Thermodynamics

272654 The work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of $1 \mathrm{~L}$ to $10 \mathrm{~L}$ at $300 \mathrm{~K}$ is
$\left(\mathrm{R}=0.0083 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

1 $0.115 \mathrm{~kJ}$
2 $58.5 \mathrm{~kJ}$
3 $11.5 \mathrm{~kJ}$
4 $5.8 \mathrm{~kJ}$
Thermodynamics

272658 Work done by an ideal gas at a constant volume is ......... .

1 $-\frac{\Delta \mathrm{p}}{\mathrm{p}}$
2 $-\mathrm{V} \Delta \mathrm{p}$
3 0
4 $\frac{\mathrm{nR}}{\mathrm{p}}$
Thermodynamics

272659 A system undergoes a process in which $\Delta \mathrm{U}=+300 \mathrm{~J}$ while absorbing $400 \mathrm{~J}$ of heat energy and undergoing an expansion against 0.5 bar. What is the change in volume (in L)?

1 4
2 5
3 2
4 3
Thermodynamics

272661 One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at $300 \mathrm{~K}$. $\Delta \mathrm{u}, \mathrm{q}$ and work done in the process are $\left[\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

1 $0,1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
2 $0,17.48 \mathrm{~J}, 1.726 \mathrm{~J}$
3 $0,21.84 \mathrm{~kJ}, 21.84 \mathrm{~kJ}$
4 none of these.
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Thermodynamics

272726 Work done by 1 mole of an ideal gas for its adiabatic reversible change when temperature attains $T_2$ from $T_1$ is'

1 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}\right)\left(\mathrm{T}_2-\mathrm{T}_1\right)$
2 $\mathrm{C}_{\mathrm{p}}\left(\mathrm{T}_1-\mathrm{T}_2\right)$
3 $\mathrm{C}_{\mathrm{V}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{V}}\right)\left(\mathrm{T}_1+\mathrm{T}_2\right)$
Thermodynamics

272654 The work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of $1 \mathrm{~L}$ to $10 \mathrm{~L}$ at $300 \mathrm{~K}$ is
$\left(\mathrm{R}=0.0083 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

1 $0.115 \mathrm{~kJ}$
2 $58.5 \mathrm{~kJ}$
3 $11.5 \mathrm{~kJ}$
4 $5.8 \mathrm{~kJ}$
Thermodynamics

272658 Work done by an ideal gas at a constant volume is ......... .

1 $-\frac{\Delta \mathrm{p}}{\mathrm{p}}$
2 $-\mathrm{V} \Delta \mathrm{p}$
3 0
4 $\frac{\mathrm{nR}}{\mathrm{p}}$
Thermodynamics

272659 A system undergoes a process in which $\Delta \mathrm{U}=+300 \mathrm{~J}$ while absorbing $400 \mathrm{~J}$ of heat energy and undergoing an expansion against 0.5 bar. What is the change in volume (in L)?

1 4
2 5
3 2
4 3
Thermodynamics

272661 One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at $300 \mathrm{~K}$. $\Delta \mathrm{u}, \mathrm{q}$ and work done in the process are $\left[\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

1 $0,1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
2 $0,17.48 \mathrm{~J}, 1.726 \mathrm{~J}$
3 $0,21.84 \mathrm{~kJ}, 21.84 \mathrm{~kJ}$
4 none of these.
Thermodynamics

272726 Work done by 1 mole of an ideal gas for its adiabatic reversible change when temperature attains $T_2$ from $T_1$ is'

1 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{v}}\right)\left(\mathrm{T}_2-\mathrm{T}_1\right)$
2 $\mathrm{C}_{\mathrm{p}}\left(\mathrm{T}_1-\mathrm{T}_2\right)$
3 $\mathrm{C}_{\mathrm{V}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 $\left(\mathrm{C}_{\mathrm{p}}-\mathrm{C}_{\mathrm{V}}\right)\left(\mathrm{T}_1+\mathrm{T}_2\right)$
Thermodynamics

272654 The work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of $1 \mathrm{~L}$ to $10 \mathrm{~L}$ at $300 \mathrm{~K}$ is
$\left(\mathrm{R}=0.0083 \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

1 $0.115 \mathrm{~kJ}$
2 $58.5 \mathrm{~kJ}$
3 $11.5 \mathrm{~kJ}$
4 $5.8 \mathrm{~kJ}$
Thermodynamics

272658 Work done by an ideal gas at a constant volume is ......... .

1 $-\frac{\Delta \mathrm{p}}{\mathrm{p}}$
2 $-\mathrm{V} \Delta \mathrm{p}$
3 0
4 $\frac{\mathrm{nR}}{\mathrm{p}}$
Thermodynamics

272659 A system undergoes a process in which $\Delta \mathrm{U}=+300 \mathrm{~J}$ while absorbing $400 \mathrm{~J}$ of heat energy and undergoing an expansion against 0.5 bar. What is the change in volume (in L)?

1 4
2 5
3 2
4 3
Thermodynamics

272661 One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at $300 \mathrm{~K}$. $\Delta \mathrm{u}, \mathrm{q}$ and work done in the process are $\left[\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

1 $0,1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
2 $0,17.48 \mathrm{~J}, 1.726 \mathrm{~J}$
3 $0,21.84 \mathrm{~kJ}, 21.84 \mathrm{~kJ}$
4 none of these.