1
MHT CET 2021 21th September Morning Shift
+1
-0

A gas is allowed to expand in an insulated container against a constant external pressure of 2.5 atm from $$2.5 \mathrm{~L}$$ to $$4.5 \mathrm{~L}$$, the change in internal energy of the gas in joules is

A
$$-836.3 \mathrm{~J}$$
B
$$-1136.2 \mathrm{~J}$$
C
$$-450 \mathrm{~J}$$
D
$$-506.5 \mathrm{~J}$$
2
MHT CET 2021 21th September Morning Shift
+1
-0

What is the work done when a gas is compressed from 2.5 $$\times$$ 10$$^{-2}$$ m$$^3$$ to 1.3 $$\times$$ 10$$^{-2}$$ m$$^3$$ at constant external pressure of 4.05 bar?

A
4050 J
B
4400 J
C
4200 J
D
4860 J
3
MHT CET 2021 20th September Evening Shift
+1
-0

Calculate heat of formation of $$\mathrm{HCl}$$ gas from following reaction.

$$\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} ; \Delta \mathrm{H}=-194 \mathrm{~kJ}$$

A
$$-143 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
B
$$-286 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
C
$$-92 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
D
$$-97 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

Calculate difference between $$\Delta \mathrm{H}$$ and $$\Delta \mathrm{U}$$ for following reaction at $$25^{\circ} \mathrm{C}$$ ?

$$\mathrm{C}_2 \mathrm{H}_{6(\mathrm{~g})}+3.5 \mathrm{O}_2 \rightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}+3 \mathrm{H}_2 \mathrm{O}_{(l)}\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$$

A
$$-9.3 \mathrm{~kJ}$$
B
$$-3.1 \mathrm{~kJ}$$
C
$$-6.2 \mathrm{~kJ}$$
D
$$-16.10 \mathrm{~kJ}$$
EXAM MAP
Medical
NEET