For a particular reversible reaction at temperature T, ∆H and ∆S were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when
Te > T
T > Te
Te is 5 times T
T = Te
The heat of sublimation of iodine is 24 cal g-1 at 50oC. If specific heat of solid iodine and its vapours are 0.055 and 0.031 cal g-1 respectively, the heat of sublimation of iodine at 100oC is
22.8 cal g-1
25.2 cal g-1
-22.8 cal g-1
-25.2 cal g-1
The Van’t Hoff reaction isotherm is
∆G = RT log Kp
–∆G = RT In Kp
∆G = RT2 In Kp
None of these
Latent heat of vaporization of a liquid at 500 K and 1 atm pressure is 10.0 kcal/mol. What will be the change in to internal energy (∆E) of 3 mole of liquid at same temperature ?
30 kcal
-54 kcal
27.0 kcal
50 kcal
For a reaction
∆H = 30 kJ mol -1 and ∆S = 0.07 kJ K -1 mol -1 at 1 atm. The temperature up to which the reaction would not be spontaneous is
T < 400.08 K
T < 273.15 K
T < 428.57 K
T < 473.50 K
When the heat of a reaction at constant pressure is -2.5 × 103 cals and entropy change for the reaction is 7.4 cal deg -1, it is predicted that the reaction at 25ºC is
reversible
spontaneous
non - spontaneous
irreversible
Mercury thermometer can be used to measure temperature up to
260oC
100oC
360oC
500oC
For a spontaneous reaction the ∆G, equilibrium constant (K) and Eocell will be respectively
–ve, > 1, -ve
–ve, < 1, -ve
+ve, > 1, -ve
–ve, > 1, +ve
A monoatomic ideal gas undergoes a process in which the ratio of p to V at any instant is constant and equals to 1. What is the molar heat capacity of the gas?
4R / 2
3R / 2
5R / 2s
Zero
