Which, among the following, is not a state function?
1. Internal energy
2. Free energy
3. Work
4. Enthalpy
The enthalpy of formation of all elements in their standard state is-
1. | Unity | 2. | Zero |
3. | Less than zero | 4. | Different for each element |
Thermodynamics is not concerned about-
1. | Energy changes involved in a chemical reaction |
2. | The extent to which a chemical reaction proceeds |
3. | The rate at which a reaction proceeds |
4. | The feasibility of a chemical reaction |
The amount of heat needed to raise the temperature of 60.0 g of aluminium from 35°C to 55°C would be -
(Molar heat capacity of Al is )
The correct statement among the following is-
1. | The presence of reacting species in a covered beaker is an example of an open system. |
2. | There is an exchange of energy as well as matter between the system and the surroundings in a closed system. |
3. | The presence of reactants in a closed vessel made up of copper is an example of a closed system. |
4. | The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system. |