# Which Will Have Greater Volume When the Following Gases Are Compared at Stp: 1.2/N2 at 25°C and 748 Mmhg 1.25/O2 at Stp - Chemistry

Numerical

Which will have greater volume when the following gases are compared at STP:

1. 1.2/N2 at 25°C and 748 mmHg
2. 1.25/O2 at STP

#### Solution

V = 1.2 litres
P = 748 mmHg
T = 298 K
P1 = 760 mmHg
T1 = 273 K
V1= ?

("P" "V")/"T" = ("P"_1 "V"_1)/"T"_1

(748xx1.2)/298 = (760xx"V"_1)/273

V1 = 1.081 litres

V = 1.25 litres
P = 760 mmHg
T = 273 K
P1 = 760 mmHg
T1 = 273 K
V1= ?

("P" "V")/"T" = ("P"_1 "V"_1)/"T"_1

(760xx1.25)/273 = (760xx"V"_1)/273

V= 1.25 litres

1.25 litres O2 will have a greater volume than 1.2 litres N2

Concept: Standard Temperature Pressure (S.T.P.)
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#### APPEARS IN

Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 7 Study of Gas Laws
Exercise 7 (B) | Q 25 | Page 127