Question

What pressure will be exerted by 10 moles of hydrogen gas in a 7.5 L cylinder at 20°C? (Given: R = 8.314 L∙kPa/K∙mol)

Answer 1

3248 kilopascals (The first option)

Answer 2

Answer: 3248.0 kPa of pressure will be exerted by 10 moles of hydrogen gas in a 7.5 L cylinder at 20°C.

Explanation:

Using ideal gas equation:

PV = nRT

`P=(nRT)/(V)`

P= pressure = ?

V= volume =
`7.5L`

n = no of moles = 10 moles

R= gas constant =0.0821 kPaL\molK

T= temperature =
`20^0C=20+273=293K`

`P=(10* 8.314kPaatm\molK* 293K)/(7.5L)`

`P=3248.0kPa`

Thus pressure exerted is 3248.0 kPa