First Law of Thermodynamics
CHXI06:THERMODYNAMICS

369369 The work done in an open vessel at \(\mathrm{300 \mathrm{~K}}\), when \(\mathrm{112 \mathrm{~g}}\) iron reacts with dil. \(\mathrm{\mathrm{HCl}}\) is
\({\rm{(R = 2}}\,{\rm{cal}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}{\rm{\;}}{{\rm{K}}^{{\rm{ - 1}}}}{\rm{)}}\)

1 \({\rm{1200}}\,{\rm{cal}}\)
2 \({\rm{600}}\,{\rm{cal}}\)
3 \({\rm{300}}\,{\rm{cal}}\)
4 \({\rm{200}}\,{\rm{cal}}\)
CHXI06:THERMODYNAMICS

369370 Three moles of an ideal gas are expanded isothermaly from a volume of \(\mathrm{300 \mathrm{~cm}^{3}}\) to \(\mathrm{2.5 \mathrm{~L}}\) at \(\mathrm{300 \mathrm{~K}}\) against a pressure of \(\mathrm{1.9 \mathrm{~atm}}\). The work done in joules is

1 \(\mathrm{-423.56 \mathrm{~J}}\)
2 \(\mathrm{+423.56 \mathrm{~J}}\)
3 \(\mathrm{-4.18 \mathrm{~J}}\)
4 \(\mathrm{+4.8 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369371 Work done when 2 mole of an ideal gas is compressed from a volume of \(\mathrm{5 \mathrm{~m}^{3}}\) to \(\mathrm{2.5 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), under a pressure of \({\text{100}}\,{\text{k}}\,{\text{pa}}\) is

1 \(\mathrm{49.75 \mathrm{~kJ}}\)
2 \(\mathrm{248.7 \mathrm{~kJ}}\)
3 \(\mathrm{497.5 \mathrm{~kJ}}\)
4 \(\mathrm{99.50 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369372 Calculate the work done during combustion of \(\mathrm{0.138 \mathrm{~kg}}\) of ethanol, \(\mathrm{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)}\) at \(\mathrm{300 \mathrm{~K}}\).
Given: \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), molar mass of ehtanol \(\mathrm{=46 \mathrm{~g} \mathrm{~mol}^{-1}}\).

1 \(\mathrm{-7482 \mathrm{~J}}\)
2 \(\mathrm{7482 \mathrm{~J}}\)
3 \(\mathrm{-2494 \mathrm{~J}}\)
4 \(\mathrm{2494 \mathrm{~J}}\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXI06:THERMODYNAMICS

369369 The work done in an open vessel at \(\mathrm{300 \mathrm{~K}}\), when \(\mathrm{112 \mathrm{~g}}\) iron reacts with dil. \(\mathrm{\mathrm{HCl}}\) is
\({\rm{(R = 2}}\,{\rm{cal}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}{\rm{\;}}{{\rm{K}}^{{\rm{ - 1}}}}{\rm{)}}\)

1 \({\rm{1200}}\,{\rm{cal}}\)
2 \({\rm{600}}\,{\rm{cal}}\)
3 \({\rm{300}}\,{\rm{cal}}\)
4 \({\rm{200}}\,{\rm{cal}}\)
CHXI06:THERMODYNAMICS

369370 Three moles of an ideal gas are expanded isothermaly from a volume of \(\mathrm{300 \mathrm{~cm}^{3}}\) to \(\mathrm{2.5 \mathrm{~L}}\) at \(\mathrm{300 \mathrm{~K}}\) against a pressure of \(\mathrm{1.9 \mathrm{~atm}}\). The work done in joules is

1 \(\mathrm{-423.56 \mathrm{~J}}\)
2 \(\mathrm{+423.56 \mathrm{~J}}\)
3 \(\mathrm{-4.18 \mathrm{~J}}\)
4 \(\mathrm{+4.8 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369371 Work done when 2 mole of an ideal gas is compressed from a volume of \(\mathrm{5 \mathrm{~m}^{3}}\) to \(\mathrm{2.5 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), under a pressure of \({\text{100}}\,{\text{k}}\,{\text{pa}}\) is

1 \(\mathrm{49.75 \mathrm{~kJ}}\)
2 \(\mathrm{248.7 \mathrm{~kJ}}\)
3 \(\mathrm{497.5 \mathrm{~kJ}}\)
4 \(\mathrm{99.50 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369372 Calculate the work done during combustion of \(\mathrm{0.138 \mathrm{~kg}}\) of ethanol, \(\mathrm{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)}\) at \(\mathrm{300 \mathrm{~K}}\).
Given: \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), molar mass of ehtanol \(\mathrm{=46 \mathrm{~g} \mathrm{~mol}^{-1}}\).

1 \(\mathrm{-7482 \mathrm{~J}}\)
2 \(\mathrm{7482 \mathrm{~J}}\)
3 \(\mathrm{-2494 \mathrm{~J}}\)
4 \(\mathrm{2494 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369369 The work done in an open vessel at \(\mathrm{300 \mathrm{~K}}\), when \(\mathrm{112 \mathrm{~g}}\) iron reacts with dil. \(\mathrm{\mathrm{HCl}}\) is
\({\rm{(R = 2}}\,{\rm{cal}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}{\rm{\;}}{{\rm{K}}^{{\rm{ - 1}}}}{\rm{)}}\)

1 \({\rm{1200}}\,{\rm{cal}}\)
2 \({\rm{600}}\,{\rm{cal}}\)
3 \({\rm{300}}\,{\rm{cal}}\)
4 \({\rm{200}}\,{\rm{cal}}\)
CHXI06:THERMODYNAMICS

369370 Three moles of an ideal gas are expanded isothermaly from a volume of \(\mathrm{300 \mathrm{~cm}^{3}}\) to \(\mathrm{2.5 \mathrm{~L}}\) at \(\mathrm{300 \mathrm{~K}}\) against a pressure of \(\mathrm{1.9 \mathrm{~atm}}\). The work done in joules is

1 \(\mathrm{-423.56 \mathrm{~J}}\)
2 \(\mathrm{+423.56 \mathrm{~J}}\)
3 \(\mathrm{-4.18 \mathrm{~J}}\)
4 \(\mathrm{+4.8 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369371 Work done when 2 mole of an ideal gas is compressed from a volume of \(\mathrm{5 \mathrm{~m}^{3}}\) to \(\mathrm{2.5 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), under a pressure of \({\text{100}}\,{\text{k}}\,{\text{pa}}\) is

1 \(\mathrm{49.75 \mathrm{~kJ}}\)
2 \(\mathrm{248.7 \mathrm{~kJ}}\)
3 \(\mathrm{497.5 \mathrm{~kJ}}\)
4 \(\mathrm{99.50 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369372 Calculate the work done during combustion of \(\mathrm{0.138 \mathrm{~kg}}\) of ethanol, \(\mathrm{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)}\) at \(\mathrm{300 \mathrm{~K}}\).
Given: \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), molar mass of ehtanol \(\mathrm{=46 \mathrm{~g} \mathrm{~mol}^{-1}}\).

1 \(\mathrm{-7482 \mathrm{~J}}\)
2 \(\mathrm{7482 \mathrm{~J}}\)
3 \(\mathrm{-2494 \mathrm{~J}}\)
4 \(\mathrm{2494 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369369 The work done in an open vessel at \(\mathrm{300 \mathrm{~K}}\), when \(\mathrm{112 \mathrm{~g}}\) iron reacts with dil. \(\mathrm{\mathrm{HCl}}\) is
\({\rm{(R = 2}}\,{\rm{cal}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}{\rm{\;}}{{\rm{K}}^{{\rm{ - 1}}}}{\rm{)}}\)

1 \({\rm{1200}}\,{\rm{cal}}\)
2 \({\rm{600}}\,{\rm{cal}}\)
3 \({\rm{300}}\,{\rm{cal}}\)
4 \({\rm{200}}\,{\rm{cal}}\)
CHXI06:THERMODYNAMICS

369370 Three moles of an ideal gas are expanded isothermaly from a volume of \(\mathrm{300 \mathrm{~cm}^{3}}\) to \(\mathrm{2.5 \mathrm{~L}}\) at \(\mathrm{300 \mathrm{~K}}\) against a pressure of \(\mathrm{1.9 \mathrm{~atm}}\). The work done in joules is

1 \(\mathrm{-423.56 \mathrm{~J}}\)
2 \(\mathrm{+423.56 \mathrm{~J}}\)
3 \(\mathrm{-4.18 \mathrm{~J}}\)
4 \(\mathrm{+4.8 \mathrm{~J}}\)
CHXI06:THERMODYNAMICS

369371 Work done when 2 mole of an ideal gas is compressed from a volume of \(\mathrm{5 \mathrm{~m}^{3}}\) to \(\mathrm{2.5 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), under a pressure of \({\text{100}}\,{\text{k}}\,{\text{pa}}\) is

1 \(\mathrm{49.75 \mathrm{~kJ}}\)
2 \(\mathrm{248.7 \mathrm{~kJ}}\)
3 \(\mathrm{497.5 \mathrm{~kJ}}\)
4 \(\mathrm{99.50 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369372 Calculate the work done during combustion of \(\mathrm{0.138 \mathrm{~kg}}\) of ethanol, \(\mathrm{\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}(l)}\) at \(\mathrm{300 \mathrm{~K}}\).
Given: \(\mathrm{\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}}\), molar mass of ehtanol \(\mathrm{=46 \mathrm{~g} \mathrm{~mol}^{-1}}\).

1 \(\mathrm{-7482 \mathrm{~J}}\)
2 \(\mathrm{7482 \mathrm{~J}}\)
3 \(\mathrm{-2494 \mathrm{~J}}\)
4 \(\mathrm{2494 \mathrm{~J}}\)