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: