Match the following parameters with a description for spontaneity.

	\(\Delta r\ H^⊝\)	\(\Delta r\ S^⊝\)	\(\Delta r\ G^⊝\)		Description
A.	+	–	+	1.	Non-spontaneous at high temperature
B.	–	–	+ at high T	2.	Spontaneous at all temperatures
C.	–	+	–	3.	Non-spontaneous at all temperatures

Codes:

	A	B	C
1.	3	1	2
2.	1	2	3
3.	1	3	2
4.	3	2	1

Match the statements given in column 1 with corresponding characteristics given in column II and choose the correct option:

Codes:

Thermodynamics is not concerned about:

The correct statement among the following is:

If the volume of a gas is reduced to half from its original volume, then the specific heat will:

During the complete combustion of one mole of butane, 2658 kJ of heat is released. The thermochemical reaction for this change is:

${∆}_{\mathrm{f}}{\mathrm{U}}^{⊝}$ of formation of ${\mathrm{CH}}_4\left(\mathrm{g}\right)$ at certain temperature is $-393$ $\mathrm{kJ}$ ${\mathrm{mol}}^{-1}$. The value of ${∆}_{\mathrm{f}}{\mathrm{H}}^{⊝}$ is-

1. Zero

2. $<{∆}_{\mathrm{f}}{\mathrm{U}}^{⊝}$

3. $>{∆}_{\mathrm{f}}{\mathrm{U}}^{⊝}$

4. Equal to ${∆}_{\mathrm{f}}{\mathrm{U}}^{⊝}$