Thermodynamics - Physical Chemistry - Chemistry Previous Year Questions

Consider the reaction,

C(s) + O\(_2\)(g) \(\rightarrow\) CO\(_2\)(g) + 393.5 kJ

The signs of \(\Delta H,\Delta S\) and \(\Delta G\) respectively are

Which of the following is an intensive property?

In which of the following process, a maximum increase in entropy is observed?

Entropy of the universe is

Thermodynamic standard conditions of temperature and pressure are

When the expansion of a gas occurs in vacuum and at constant volume, then

The value of \(\Delta G^\circ\) for the phosphorylation of glucose in glycolysis is 13.8 kJ/mol. The value of \(K_C\) at 298 K is

Calculate the difference between C\(_p\) and C\(_V\) for 10 moles of an ideal gas

The change in the energy of system if 500 cal of heat energy are added to a system and system does 350 cal of work on the surroundings will be

Which of the following are not path functions?

I. H \(-\) TS

II. W

III. q

IV. q + W

The relation between work done in reversible and irreversible process is

In which of the following changes, entropy decreases?

The difference between heat capacity at constant pressure and heat capacity at constant volume is

A Gas taken in a closed vessel is heated from \(54^{\circ} \mathrm{C}\) to \(1254^{\circ} \mathrm{C}\). The pressure of the gas becomes ___________ times its original pressure \(\mathrm{P_1}\)

\(5.8 \mathrm{~g}\) of a gas maintained at \(95^{\circ} \mathrm{C}\) occupies the same volume as \(0.368 \mathrm{~g}\) of hydrogen gas maintained at a temperature of \(17^{\circ} \mathrm{C}\) and pressure being the same atmospheric pressure for both the gases. What is the molecular mass of the unknown gas?

Gaseous Nitrous oxide decomposes at \(298 \mathrm{~K}\) to form Nitrogen gas and Oxygen gas. The \(\Delta \mathbf{H}\) for the reaction at \(1.0 \mathrm{~atm}\) pressure and \(298 \mathrm{~K}\) is \(\mathbf{- 1 6 3 . 1 5} \mathbf{~ k J}\). Calculate Internal energy change for the decomposition of \(100 \mathrm{~g}\) of Nitrous oxide gas under the same conditions of temperature and pressure.

The correct option for free expansion of an ideal gas under adiabatic condition is:

At Constant volume, the heat required to raise the temperature of \(4.48 \mathrm{~L}\) of an ideal gas at STP by \(15^{\circ} \mathrm{C}\) is 12.0 calories. The \(\mathrm{C_p}\) of the gas is _____________ \((\mathrm{R}=2 \mathrm{~Cal} \mathrm{~kg}^{-1} \mathrm{~mol}^{-1})\)

The \(\Delta \mathrm{H}_{(\mathrm{f})}^{\mathrm{o}}\) of \(\mathrm{NO}_2(\mathrm{~g})\) and \(\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g})\) are 16.0 and \(4.0 \mathrm{k} \mathrm{cal} \mathrm{mol}^{-1}\) respectively. The heat of dimerisation of \(\mathrm{NO}_2\) in \(\mathrm{k}\) cal is :

The Enthalpy of combustion of \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}(\mathrm{s})\) at \(25^{\circ} \mathrm{c}\) and 1.0 atm pressure is \(-2546 \mathrm{~kJ} / \mathrm{mol}\). What is the Internal energy change for this reaction?