Thermodynamics Chemistry Set 5

If 50 calorie are added to a system and system does work of 30 calorie on surroundings, the change in internal energy of system is:

If a refrigerator's door is opened then, we get

When a bottle of perfume is opened, odourous molecules mix with air and slowly diffuse throughout the entire room. The incorrect fact about the process is;

Equilibrium constant of a reaction is related to:

48 g of C (diamond) on complete combustion evolves 1584 kJ of heat. The standard heat of formation of gaseous carbon is 725 kJ/mol. The energies required for the process
(i)C (graphite) C(gas)
(ii)C (diamond) C(gas)are:

An example of closed system is:

At pressure, The temperature of the reaction at equilibrium is:

2.1 g of Fe combines with S evolving 3.77 kJ. The heat of formation of FeS in kJ/mole is

In an isochoric process, the increase in internal energy is

The sublimation energy of is 57.3 kJ/mol and the enthalpy of fusion is 15.5 kJ/mol. The enthalpy of vaporisation of is