When two ideal liquids are mixed, the enthalpy of the system - 

Select the correct order in the following :

Which among the following is not a state function -

A state function is that - 

Difference between H and E for the combusion of liquid benzene at 27°C is -

One litre-atmosphere is approximately equal to-

In the combustion of 4g. of CH4 , 2.5 K cal of heat is if liberated. The heat of combustion of CH4 is - 

When ammonium chloride is dissolved in water, the solution becomes cold. The change is -

The enthalpies of all elements in their standard states are -

For the process, melting of ice at 260 K the  H is - 

Enthalpy of formation of compound is - 

The enthalpy of combustion of a substance -

For which of the following processes will energy be absorbed -

The heats of neutralisation of four acids a, b,c and d when neutralised against a common strong base are 13.7, 9.4, 11.2 and 12.4 kcal respectively. The weakest among these acids is

The heat of neutralization of HCN by NaOH is 13.3 KJ/mole, the energy of dissociation of HCN is - 

A solution of 500 ml of 0.2 M KOH and 500 ml of 0.2 M HCl is mixed and stirred; the rise in temperature is T1 . The experiment is repreated using 250 ml each of solution, the temperature raised is T2 . Which of the following is true -

In decomposition reactions enthalpy of products is mostly..........than the enthalpy of reactants?

5 The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is known as -

According to Hess's Law the thermal effect of a reaction depends on - 

When the egg is hard boiled, there is -

Free energy change of reversible reaction at equilibrium is - 

For the reversible vapourisation of water at 1000 C and 1 atmospheric pressure. G is equal to?

2 The least random state of H2O system is - 

Which law of thermodynamics introduces the concept of entropy ?

The total entropy change for a system and its surroundings increases, if the process is

Which of the following state function is not zero at standard state -

In any natural process -

Which law of thermodynamics helps in calculating the absolute entropies of various substances at diffrent temperatures -

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The E for this process is (R = 2 cal mol–1 K–1) - 

An exothermic reaction has a large positive entropy change. The reaction will be -