Heat of Reaction
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CHXI06:THERMODYNAMICS

369460 Which of the following statement is correct?

1 \(\Delta \mathrm{H}\) is positive for exothermic reactions.
2 \(\Delta \mathrm{H}\) is negative for endothermic reactions.
3 The heat of neutralization of strong acid and strong base is always the same.
4 The enthalpy of fusion is negative.
CHXI06:THERMODYNAMICS

369461 The enthalpy of vapourisation of \(\mathrm{\mathrm{CCl}_{4}}\) is \(\mathrm{30.5 \mathrm{~kJ}}\) \(\mathrm{\mathrm{mol}^{-1}}\). The heat required for the vapourisation of \(\mathrm{284 \mathrm{~g}}\) of \(\mathrm{\mathrm{CCl}_{4}}\) at constant pressure is (Molar mass of \(\mathrm{\mathrm{CCl}_{4}=154 \mathrm{~g} \mathrm{~mol}^{-1}}\) ).

1 \(\mathrm{30.5 \mathrm{~kJ}}\)
2 \(\mathrm{56.2 \mathrm{~kJ}}\)
3 \(\mathrm{65.2 \mathrm{~kJ}}\)
4 \(\mathrm{26.5 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369462 Calculate \(\mathrm{\Delta H}\) at \(\mathrm{85^{\circ} \mathrm{C}}\) for the reaction, \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{Fe}_{(s)}+3 \mathrm{H}_{2} \mathrm{O}_{(l)}}\).
Given : \({\rm{\Delta H}}_{{\rm{(298}}\,{\rm{K)}}}^{\rm{o}}{\rm{ = - 33}}{\rm{.29\;}}\,{\rm{k}}\,{\rm{J/mol}}\) and
\(\begin{array}{*{20}{c}}{{\rm{Substance}}}&{{\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s)}}}&{{\rm{F}}{{\rm{e}}_{{\rm{(s)}}}}}&{{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}}&{{{\rm{H}}_{{\rm{(2)g}}}}}\\{{\rm{C}}_{\rm{P}}^{\rm{O}}\,\left( {{\rm{J/K}}\,{\rm{ - }}\,{\rm{mol}}} \right)}&{{\rm{103}}{\rm{.8}}}&{{\rm{25}}{\rm{.1}}}&{{\rm{75}}{\rm{.3}}}&{{\rm{28}}{\rm{.8}}}\end{array}\)

1 \(\mathrm{-28.14 \mathrm{~kJ} / \mathrm{mol}}\)
2 \(\mathrm{35.9 \mathrm{~kJ} / \mathrm{mol}}\)
3 \(\mathrm{-303.29 \mathrm{~kJ} / \mathrm{mol}}\)
4 \(\mathrm{-25.1 \mathrm{~kJ} / \mathrm{mol}}\)
CHXI06:THERMODYNAMICS

369463 Variation of heat of reaction with temperature is known as

1 Van't Hoff isotherm
2 Van't Hoff isochore
3 Kirchoff's equation
4 None of the above
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CHXI06:THERMODYNAMICS

369460 Which of the following statement is correct?

1 \(\Delta \mathrm{H}\) is positive for exothermic reactions.
2 \(\Delta \mathrm{H}\) is negative for endothermic reactions.
3 The heat of neutralization of strong acid and strong base is always the same.
4 The enthalpy of fusion is negative.
CHXI06:THERMODYNAMICS

369461 The enthalpy of vapourisation of \(\mathrm{\mathrm{CCl}_{4}}\) is \(\mathrm{30.5 \mathrm{~kJ}}\) \(\mathrm{\mathrm{mol}^{-1}}\). The heat required for the vapourisation of \(\mathrm{284 \mathrm{~g}}\) of \(\mathrm{\mathrm{CCl}_{4}}\) at constant pressure is (Molar mass of \(\mathrm{\mathrm{CCl}_{4}=154 \mathrm{~g} \mathrm{~mol}^{-1}}\) ).

1 \(\mathrm{30.5 \mathrm{~kJ}}\)
2 \(\mathrm{56.2 \mathrm{~kJ}}\)
3 \(\mathrm{65.2 \mathrm{~kJ}}\)
4 \(\mathrm{26.5 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369462 Calculate \(\mathrm{\Delta H}\) at \(\mathrm{85^{\circ} \mathrm{C}}\) for the reaction, \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{Fe}_{(s)}+3 \mathrm{H}_{2} \mathrm{O}_{(l)}}\).
Given : \({\rm{\Delta H}}_{{\rm{(298}}\,{\rm{K)}}}^{\rm{o}}{\rm{ = - 33}}{\rm{.29\;}}\,{\rm{k}}\,{\rm{J/mol}}\) and
\(\begin{array}{*{20}{c}}{{\rm{Substance}}}&{{\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s)}}}&{{\rm{F}}{{\rm{e}}_{{\rm{(s)}}}}}&{{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}}&{{{\rm{H}}_{{\rm{(2)g}}}}}\\{{\rm{C}}_{\rm{P}}^{\rm{O}}\,\left( {{\rm{J/K}}\,{\rm{ - }}\,{\rm{mol}}} \right)}&{{\rm{103}}{\rm{.8}}}&{{\rm{25}}{\rm{.1}}}&{{\rm{75}}{\rm{.3}}}&{{\rm{28}}{\rm{.8}}}\end{array}\)

1 \(\mathrm{-28.14 \mathrm{~kJ} / \mathrm{mol}}\)
2 \(\mathrm{35.9 \mathrm{~kJ} / \mathrm{mol}}\)
3 \(\mathrm{-303.29 \mathrm{~kJ} / \mathrm{mol}}\)
4 \(\mathrm{-25.1 \mathrm{~kJ} / \mathrm{mol}}\)
CHXI06:THERMODYNAMICS

369463 Variation of heat of reaction with temperature is known as

1 Van't Hoff isotherm
2 Van't Hoff isochore
3 Kirchoff's equation
4 None of the above
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CHXI06:THERMODYNAMICS

369460 Which of the following statement is correct?

1 \(\Delta \mathrm{H}\) is positive for exothermic reactions.
2 \(\Delta \mathrm{H}\) is negative for endothermic reactions.
3 The heat of neutralization of strong acid and strong base is always the same.
4 The enthalpy of fusion is negative.
CHXI06:THERMODYNAMICS

369461 The enthalpy of vapourisation of \(\mathrm{\mathrm{CCl}_{4}}\) is \(\mathrm{30.5 \mathrm{~kJ}}\) \(\mathrm{\mathrm{mol}^{-1}}\). The heat required for the vapourisation of \(\mathrm{284 \mathrm{~g}}\) of \(\mathrm{\mathrm{CCl}_{4}}\) at constant pressure is (Molar mass of \(\mathrm{\mathrm{CCl}_{4}=154 \mathrm{~g} \mathrm{~mol}^{-1}}\) ).

1 \(\mathrm{30.5 \mathrm{~kJ}}\)
2 \(\mathrm{56.2 \mathrm{~kJ}}\)
3 \(\mathrm{65.2 \mathrm{~kJ}}\)
4 \(\mathrm{26.5 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369462 Calculate \(\mathrm{\Delta H}\) at \(\mathrm{85^{\circ} \mathrm{C}}\) for the reaction, \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{Fe}_{(s)}+3 \mathrm{H}_{2} \mathrm{O}_{(l)}}\).
Given : \({\rm{\Delta H}}_{{\rm{(298}}\,{\rm{K)}}}^{\rm{o}}{\rm{ = - 33}}{\rm{.29\;}}\,{\rm{k}}\,{\rm{J/mol}}\) and
\(\begin{array}{*{20}{c}}{{\rm{Substance}}}&{{\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s)}}}&{{\rm{F}}{{\rm{e}}_{{\rm{(s)}}}}}&{{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}}&{{{\rm{H}}_{{\rm{(2)g}}}}}\\{{\rm{C}}_{\rm{P}}^{\rm{O}}\,\left( {{\rm{J/K}}\,{\rm{ - }}\,{\rm{mol}}} \right)}&{{\rm{103}}{\rm{.8}}}&{{\rm{25}}{\rm{.1}}}&{{\rm{75}}{\rm{.3}}}&{{\rm{28}}{\rm{.8}}}\end{array}\)

1 \(\mathrm{-28.14 \mathrm{~kJ} / \mathrm{mol}}\)
2 \(\mathrm{35.9 \mathrm{~kJ} / \mathrm{mol}}\)
3 \(\mathrm{-303.29 \mathrm{~kJ} / \mathrm{mol}}\)
4 \(\mathrm{-25.1 \mathrm{~kJ} / \mathrm{mol}}\)
CHXI06:THERMODYNAMICS

369463 Variation of heat of reaction with temperature is known as

1 Van't Hoff isotherm
2 Van't Hoff isochore
3 Kirchoff's equation
4 None of the above
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CHXI06:THERMODYNAMICS

369460 Which of the following statement is correct?

1 \(\Delta \mathrm{H}\) is positive for exothermic reactions.
2 \(\Delta \mathrm{H}\) is negative for endothermic reactions.
3 The heat of neutralization of strong acid and strong base is always the same.
4 The enthalpy of fusion is negative.
CHXI06:THERMODYNAMICS

369461 The enthalpy of vapourisation of \(\mathrm{\mathrm{CCl}_{4}}\) is \(\mathrm{30.5 \mathrm{~kJ}}\) \(\mathrm{\mathrm{mol}^{-1}}\). The heat required for the vapourisation of \(\mathrm{284 \mathrm{~g}}\) of \(\mathrm{\mathrm{CCl}_{4}}\) at constant pressure is (Molar mass of \(\mathrm{\mathrm{CCl}_{4}=154 \mathrm{~g} \mathrm{~mol}^{-1}}\) ).

1 \(\mathrm{30.5 \mathrm{~kJ}}\)
2 \(\mathrm{56.2 \mathrm{~kJ}}\)
3 \(\mathrm{65.2 \mathrm{~kJ}}\)
4 \(\mathrm{26.5 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369462 Calculate \(\mathrm{\Delta H}\) at \(\mathrm{85^{\circ} \mathrm{C}}\) for the reaction, \(\mathrm{\mathrm{Fe}_{2} \mathrm{O}_{3}(s)+3 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{Fe}_{(s)}+3 \mathrm{H}_{2} \mathrm{O}_{(l)}}\).
Given : \({\rm{\Delta H}}_{{\rm{(298}}\,{\rm{K)}}}^{\rm{o}}{\rm{ = - 33}}{\rm{.29\;}}\,{\rm{k}}\,{\rm{J/mol}}\) and
\(\begin{array}{*{20}{c}}{{\rm{Substance}}}&{{\rm{F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s)}}}&{{\rm{F}}{{\rm{e}}_{{\rm{(s)}}}}}&{{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}}&{{{\rm{H}}_{{\rm{(2)g}}}}}\\{{\rm{C}}_{\rm{P}}^{\rm{O}}\,\left( {{\rm{J/K}}\,{\rm{ - }}\,{\rm{mol}}} \right)}&{{\rm{103}}{\rm{.8}}}&{{\rm{25}}{\rm{.1}}}&{{\rm{75}}{\rm{.3}}}&{{\rm{28}}{\rm{.8}}}\end{array}\)

1 \(\mathrm{-28.14 \mathrm{~kJ} / \mathrm{mol}}\)
2 \(\mathrm{35.9 \mathrm{~kJ} / \mathrm{mol}}\)
3 \(\mathrm{-303.29 \mathrm{~kJ} / \mathrm{mol}}\)
4 \(\mathrm{-25.1 \mathrm{~kJ} / \mathrm{mol}}\)
CHXI06:THERMODYNAMICS

369463 Variation of heat of reaction with temperature is known as

1 Van't Hoff isotherm
2 Van't Hoff isochore
3 Kirchoff's equation
4 None of the above
For More Updates join with Us