Question 930: Thermodynamics & KTG

Question

A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27$$^\circ $$C
Its density is : (R = 8.3 J mol
-1
K
-1
)

Accepted Answer

From the ideal gas equation, PV = nRT also
Volume (V) = $${{mass(M)} \over {density(ho )}}$$
So, PM = $$ho $$RT
P = 249 $$ 	imes $$ 10
3
N/m
2
M = 2 $$ 	imes $$ 10
-3
kg
T = 333 K
$$ho $$ = $${{\left( {249 	imes {{10}^3}} ight)\left( {2 	imes {{10}^{ - 3}}} ight)} \over {8.3 	imes 300}}$$
= 0.2 kg/m
3

Answer

0.2 kg/m
3

Answer

0.1 kg/m
3

Answer

0.02 kg/m
3

Answer

0.5 kg/m
3

Thermodynamics & KTG

A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27$^\circ $C Its density is : (R = 8.3 J mol -1 K -1 )

Choose the correct answer: