Question 322: Thermodynamics & KTG

Question

7 mol of a certain monoatomic ideal gas undergoes a temperature increase of $$40 \mathrm{~K}$$ at constant pressure. The increase in the internal energy of the gas in this process is :
(Given $$\mathrm{R}=8.3 \,\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$$ )

Accepted Answer

$$\Delta U = n{C_v}\Delta T$$
$$ = 7 	imes {{3R} \over 2} 	imes 40$$
$$ = 3486\,J$$

Answer

5810 J

Answer

3486 J

Answer

11620 J

Answer

6972 J

Thermodynamics & KTG

7 mol of a certain monoatomic ideal gas undergoes a temperature increase of $40 \mathrm{~K} at constant pressure. The increase in the internal energy of the gas in this process is : (Given \mathrm{R}=8.3 \,\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ )

Choose the correct answer: