Question 951: Thermodynamics & KTG

Question

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure.
The change in internal energy of the gas during the transition is

Accepted Answer

Change in internal energy from A $$ 	o $$ B
$$\Delta U = {f \over 2}nR\Delta T = {f \over 2}nR\left( {{T_f} - {T_i}} ight)$$
$$ = {5 \over 2}\left\{ {{P_f}{V_f} - {P_i}{V_i}} ight\}$$
(As gas is diatomic $$ 	herefore $$ f = 5)
$$ = {5 \over 2}\left\{ {2 	imes {{10}^3} 	imes 6 - 5 	imes {{10}^3} 	imes 4} ight\}$$
$$ = {5 \over 2}\left\{ {12 - 20} ight\} 	imes {10^3}J = 5 	imes \left( { - 4} ight) 	imes {10^3}J$$
$$ 	herefore \Delta U =  - 20\,KJ$$

Answer

20 J

Answer

$$-$$ 12 kJ

Answer

20 kJ

Answer

$$-$$ 20 kJ

Thermodynamics & KTG

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure. The change in internal energy of the gas during the transition is

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