Question

Gas hydrogen is collected over water at 14°C, The pressure of hydrogen collected fond
to be 760 mm Hg, Calculate the pressure of dry hydrogen if water vapour precawe is
14 °C is 12 mm Hg.​

Answer 1

Answer:

45.58

Explanation:

Given that

P

1

=750mmHg−14mmHg=736mmHg

V

1

=50cm

3

,T

1

=17

0

C=290K

P

2

=760mmHg

V

2

=?cm

3

,T

2

=0

0

C=273K

Hence the Gas equation

T

1

P

1

V

1

=

T

2

P

2

V

2

290

736×50

=

273

760×V

2

∴V

2

=

290×760

736×50×273

V

2

=45.58 cm

3

Thus, the volume of dry gas at STP is 45.58 cm

3