Chemistry questions
29404 published questions with worked solutions.
- According to the second law of thermodynamics, a process, reaction is spontaneous, if during the process
- Which one of the following has S^0 greater than zero?
- Which law of thermodynamics helps in calculating the absolute entropies of various substances at different temperatures
- Which one is incorrect statement of the second law of thermodynamics?
- G for the reaction Ag_2O 2Ag + 1 2 O_2 at a certain temperature is found to be -10.0 kJ ,mol^ -1 . Which one of the following...
- The sign of G for the process of melting of ice at 273 K and 1 atm pressure is
- For a reaction to have highest spontaneity, it should be
- For a system in equilibrium G = 0, under conditions of constants
- Entropy change of a system and its surrounding in equilibrium
- In a reversible process, S_ system + S_ surroundings is
- The enthalpy change is constant irrespective of steps involved. This statement is known as
- The favorable conditions for a spontaneous reaction are
- The enthalpy of vaporization of a substance is 840 kJ ,mol^ -1 and its boiling point is -173^ C . Its entropy of vaporization is
- Given that : C(graphite) C(g) ; H = 716.7 kJ and C(diamond) C(g) ; H = 714.8 kJ. The H for the reaction C(graphite) C(diamond) is
- The free energy change for a reversible reaction at equilibrium is
- For the reaction C(s) + O_2(g) CO_2(g) ; H_1 = -394 kJ ,mol^ -1 and 2CO(g) + O_2(g) 2CO_2 ; H_2 = -569 kJ, H for formation of CO...
- For the reaction 2SO_2(g) + O_2(g) 2SO_3(g) the entropy
- Hess's law is used to calculate
- Hess's law is used to calculate
- Identify the correct statement for the change of Gibbs energy for a system ( G_ system ) at constant temperature and pressure