1. ΔH>ΔU
2. ΔH
3. ΔH=ΔU
4. Not definite
ΔH<ΔU
1. ΔG and ΔH should be negative
2. ΔH=ΔG=0
3. ΔG and ΔH should be positive
4. ΔH
ΔG and ΔH should be negative
1. ΔH is negative
2. Heat is given to the surroundings
3. Enthalpy of the reactants is less than that of the products
4. ΔE is negative
Enthalpy of the reactants is less than that of the products
1. -34.39 kcal
2. 102.39 kcal
3. 34.39 kcal
4. 130.39 kcal
102.39 kcal
1. Latent heat of vaporization of methane
2. The first four ionization energies of carbon and electron gain enthalpy of hydrogen.
3. The dissociation energy of hydrogen molecules, H2
4. The dissociation energy of H2and enthalpy of sublimation of carbon
The dissociation energy of H2and enthalpy of sublimation of carbon
1. -6000.0 J
2. -333 J
3. 333.33 J
4. 60.0 J
-6000.0 J
1. 1238.78Jmol-1
2. -2477.57Jmol-1
3. 2477.57Jmol-1
4. -1238.78Jmol-1
1238.78Jmol-1
1. Zero
2. Negative
3. Positive
4. May be negative or zero
Positive
1. -170kJ mol-1
2. -260kJ mol-1
3. -400kJ mol-1
4. -450kJ mol-1
-170kJ mol-1
1. 736 K
2. 1050K
3. 1150 K
4. 11500C
1150 K