- 1(current)
Q. No.The enthalpy of formation of CO2(g), H2O(l) and propene (g) are -393.5, -285.8, and 20.42 kJ mol-1 respectively. The enthalpy change for the combustion of cyclopropane at 298 K will be:
(The enthalpy of isomerization of cyclopropane to propene is -33.0 kJ mol-1. )
1. -1021.32 kJ mol-1
2. -2091.32 kJ mol-1
3. -5021.32 kJ mol-1
4. -3141.32 kJ mol-1
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What is the value of ∆H for the reaction 2Al + Cr₂O₃ → 2Cr + Al₂O₃, knowing that the enthalpies of
formation of Al₂O₃ and Cr₂O₃ are –1596 kJ and –1134 kJ, respectively?
| 1. | –1365 kJ | 2. | 2730 kJ |
| 3. | –2730 kJ | 4. | –462 kJ |
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On complete combustion, 4.8 g of diamond releases 158.4 kJ of heat. The standard enthalpy of formation of gaseous carbon is 725 kJ mol⁻¹. Calculate the energy required for the following process:
(Given - Heat of combustion of graphite is −394 kJ mol⁻¹.)
(i)
(ii)
| 1. | 725, 727 | 2. | 727, 725 |
| 3. | 725, 723 | 4. | None of the above |
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- 1(current)
Q. No.
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