Laws of Thermochemistry
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NEET DIGITAL LIBRARY
CHXI06:THERMODYNAMICS

369502 Heat of neutralisation of \(\mathrm{\mathrm{NaOH}}\) and \(\mathrm{\mathrm{HCl}}\) is \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The heat of ionisation of water will be

1 \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{-114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{+57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{+114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369503 When 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is decomposed by platinum black, the heat evolved is \(\mathrm{96.6 \mathrm{~kJ}}\). The heat of formation of 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is

1 \(\mathrm{96.6 \mathrm{~kJ}}\)
2 \(\mathrm{193.2 \mathrm{~kJ}}\)
3 \(\mathrm{386.4 \mathrm{~kJ}}\)
4 \(\mathrm{48.3 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369504 The enthalpy of formation of ammonia is \(\mathrm{-46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The enthalpy change for the reaction \(\mathrm{2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{~N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})}}\) is

1 \(\mathrm{46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{-23.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{-92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369516 In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system

1 \(\mathrm{q_{p}}\) will be negative
2 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be zero
3 \(\mathrm{q_{p}}\) will be positive
4 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be positive
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CHXI06:THERMODYNAMICS

369502 Heat of neutralisation of \(\mathrm{\mathrm{NaOH}}\) and \(\mathrm{\mathrm{HCl}}\) is \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The heat of ionisation of water will be

1 \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{-114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{+57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{+114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369503 When 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is decomposed by platinum black, the heat evolved is \(\mathrm{96.6 \mathrm{~kJ}}\). The heat of formation of 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is

1 \(\mathrm{96.6 \mathrm{~kJ}}\)
2 \(\mathrm{193.2 \mathrm{~kJ}}\)
3 \(\mathrm{386.4 \mathrm{~kJ}}\)
4 \(\mathrm{48.3 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369504 The enthalpy of formation of ammonia is \(\mathrm{-46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The enthalpy change for the reaction \(\mathrm{2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{~N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})}}\) is

1 \(\mathrm{46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{-23.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{-92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369516 In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system

1 \(\mathrm{q_{p}}\) will be negative
2 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be zero
3 \(\mathrm{q_{p}}\) will be positive
4 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be positive
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CHXI06:THERMODYNAMICS

369502 Heat of neutralisation of \(\mathrm{\mathrm{NaOH}}\) and \(\mathrm{\mathrm{HCl}}\) is \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The heat of ionisation of water will be

1 \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{-114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{+57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{+114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369503 When 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is decomposed by platinum black, the heat evolved is \(\mathrm{96.6 \mathrm{~kJ}}\). The heat of formation of 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is

1 \(\mathrm{96.6 \mathrm{~kJ}}\)
2 \(\mathrm{193.2 \mathrm{~kJ}}\)
3 \(\mathrm{386.4 \mathrm{~kJ}}\)
4 \(\mathrm{48.3 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369504 The enthalpy of formation of ammonia is \(\mathrm{-46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The enthalpy change for the reaction \(\mathrm{2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{~N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})}}\) is

1 \(\mathrm{46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{-23.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{-92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369516 In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system

1 \(\mathrm{q_{p}}\) will be negative
2 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be zero
3 \(\mathrm{q_{p}}\) will be positive
4 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be positive
NEET DIGITAL LIBRARY
CHXI06:THERMODYNAMICS

369502 Heat of neutralisation of \(\mathrm{\mathrm{NaOH}}\) and \(\mathrm{\mathrm{HCl}}\) is \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The heat of ionisation of water will be

1 \(\mathrm{-57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{-114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{+57.3 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{+114.6 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369503 When 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is decomposed by platinum black, the heat evolved is \(\mathrm{96.6 \mathrm{~kJ}}\). The heat of formation of 1 mole of \(\mathrm{\mathrm{H}_{2} \mathrm{O}_{2}}\) is

1 \(\mathrm{96.6 \mathrm{~kJ}}\)
2 \(\mathrm{193.2 \mathrm{~kJ}}\)
3 \(\mathrm{386.4 \mathrm{~kJ}}\)
4 \(\mathrm{48.3 \mathrm{~kJ}}\)
CHXI06:THERMODYNAMICS

369504 The enthalpy of formation of ammonia is \(\mathrm{-46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\). The enthalpy change for the reaction \(\mathrm{2 \mathrm{NH}_{3(\mathrm{~g})} \rightarrow 2 \mathrm{~N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})}}\) is

1 \(\mathrm{46.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
2 \(\mathrm{92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
3 \(\mathrm{-23.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
4 \(\mathrm{-92.0 \mathrm{~kJ} \mathrm{~mol}^{-1}}\)
CHXI06:THERMODYNAMICS

369516 In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system

1 \(\mathrm{q_{p}}\) will be negative
2 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be zero
3 \(\mathrm{q_{p}}\) will be positive
4 \(\mathrm{\Delta_{\mathrm{r}} \mathrm{H}}\) will be positive
Join With Us for More Updates