The maximum work done in expanding 16g isothermally at 300 K and occupying a volume of
5 dm3 until the volume becomes 25 dm3 is:
1. –2.01 J
2. 2.01× J
3. +2.81 J
4. +2.01J
Which of the following conditions will always lead to a non-spontaneous change?
1. Positive and positive
2. Negative and negative
3. Positive and negative
4. Negative and positive
To calculate the amount of work done in joules during reversible isothermal expansion of an ideal gas, the volume must be expressed in:
1. | m3 only | 2. | dm3 only |
3. | cm3 only | 4. | All of the above |
For the conversion C(graphite) C(diamond) the is:
1. Zero
2. Positive
3. Negative
4. Unknown
The entropy change in the conversion of one mole of liquid water at 373 K to vapour at the same temperature would be: (Latent heat of vaporization of water, )
1. 105.9 JK-1mol-1
2. 107.9 JK-1mol-1
3. 108.9 JK-1mol-1
4. 109.9 JK-1mol-1
\(\underset {-10.7 \mathrm{JK}^{-1}} {\mathrm{H}_{(a q)}^{+}+\mathrm{OH^{-}}_{(a q)}} \rightarrow \underset {+70 \mathrm{JK}^{-1} \mathrm{~mol}^{-1} } {\mathrm{H}_{2} \mathrm{O}_{(l)}} ~~ \mathrm{S}^{\circ}(298 \mathrm{~K})\)
Standard entropy change for the above reaction is:
1. 60.3 JK-1 mol-1
2. 80.7 JK-1 mol-1
3. -70 JK-1 mol-1
4. +10.7 JK-1 mol-1
Hydrolysis of sucrose is given by the following reaction
Sucrose + H2O Glucose + Fructose
If the equilibrium constant (Kc) is 21013 at 300 K, the value of at the same temperature will be:
1. 8.314 J mol–1 K–1300 Kln (21013)
2. 8.314 J mol–1 K–1300 Kln (31013)
3. –8.314 J mol–1 K–1300 Kln (41013)
4. –8.314 J mol–1 K–1300 Kln (21013)
For the reaction, 2Cl(g) Cl2(g), the correct option is:
1.
2.
3.
4.
When 4 g of iron is burnt to ferric oxide at a constant pressure, 29.28 kJ of heat is evolved.
The enthalpy of formation of ferric oxide will be-
(At. mass of Fe = 56) ?
1. 81.98 kJ
2. 819.8 kJ
3. 40.99 kJ
4. +819.8 kJ
The difference in for combustion of benzoic acid at 300 K is equal to-
1. -1.247 kJ
2. +1.247 kJ
3. -1.247 J
4. +1.247 J