Chemical Thermodynamics MCQs for NEET — Chemistry Questions with Answers

An isolated system-

The correct calculate value for $△H$ for

$M\left(s\right) \to M^{2+}\left(ag\right)$

From following arbitrary value

$$\begin{gathered} M\left(s\right) \to M\left(g\right) ;△H = 1000KJ mo{l}^{-1} \\ M\left(g\right) \to M^{+}\left(g\right) ; △H = 750KJ mo{l}^{-1} \\ {M}^{+}\left(g\right)\to M^{2+}\left(g\right);△H = 1200KJ mo{l}^{-1} \\ {M}^{2+}\left(g\right)+aq \to M^{2+}(aq.); △H = -1800KJ mo{l}^{-1} \end{gathered}$$

Internal energy and pressure of a gas per unit volume are related as                       

Work done in reversible adiabatic process is given by:

Change in enthalpy for reaction,

2H₂O₂(l)$\to$ 2H₂O(l) + O₂(g)

if the heat of formation of H₂O₂(l) and H₂O(l) are -188 and -286 kJ/mol respectively is           

One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95 K)$\to$(4.0 atm, 5.0 L, 245 K) with a change in internal energy, $∆$U = 30.0 L atm. The change in enthalpy ($∆$H) of the process in L atm is:

At absolute zero, the entropy of a perfect crystal is zero. This is........... of thermodynamics.

At constant pressure and temperature, the direction of any chemical reaction is one where, the...... decrease.

The work done by a mass less piston in causing an expansion $∆$V (at constant temperature), when the opposing pressure, P is variable, is given by:

Entropy decreases during: