Question 275: Thermodynamics & KTG

Question

A cylinder of fixed capacity of 44.8 litres contains helium gas at standard temperature and pressure. The amount of heat needed to raise the temperature of gas in the cylinder by 20.0$$^\circ$$C will be :
(Given gas constant R = 8.3 JK
$$-$$1
-mol
$$-$$1
)

Accepted Answer

$$\Delta Q = n{C_v}\Delta T$$ (Isochoric process)
$$ = 2 	imes {{3R} \over 2} 	imes 20$$
$$ = 498$$ J

Answer

249 J

Answer

415 J

Answer

498 J

Answer

830 J

Thermodynamics & KTG

A cylinder of fixed capacity of 44.8 litres contains helium gas at standard temperature and pressure. The amount of heat needed to raise the temperature of gas in the cylinder by 20.0$^\circC will be : (Given gas constant R = 8.3 JK -1 -mol -$1 )

Choose the correct answer: