A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ∆U of the gas in joules will be

At standard conditions, if the change in the enthalpy for the following reaction is -109kJ mol⁻¹.

Given that bond energy of H₂ and Br₂ is 435kJ mol⁻¹ and 192kJ mol⁻¹, respectively, what is the bond energy (in kJ mol⁻¹ of HBr ?

If for a certain reaction for which the same reaction will be spontaneous at the same temperature is

In which of the following processes entropy increases?

Choose the correct answer from the options given below:

Match the List – I with List II.

Choose the correct answer from the options given below:

The work done during reversible isothermal expansion of one mole of hydrogen gas at from pressure of 20 atmosphere to 10 atmosphere is:

Which of the following p-V curve represents maximum work done?

Which of the following statements is correct for the spontaneous adsorption of a gas ?

For the reaction :


Hence ∆G is :-

Which one among the following is the correct option for right relationship between for one mole of ideal gas?