# A Given Amount of Gas a is Confined in a Chamber of Constant Volume. When the Chamber is Immersed in a Bath of Melting Ice, the Pressure of the Gas is 100 Cmhg. - Chemistry

Numerical

A given amount of gas A is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 100 cmHg.

1. What is the temperature when the pressure is 10cmHg?
2. What will be the pressure when the chamber is brought to 100°C

#### Solution

(a) V1 = V2 = V
P1 = 100 cm Hg
T1 = 273 K
P2 = 10 cm Hg
T2= ?

("P"_1 "V"_1)/"T"_1 = ("P"_2 "V"_2)/"T"_2

(100 xx"V")/273 = (10 xx"V")/"T"_2

"T"_2 = 27.3 "K"

(b) V1 = V2 = V
P1 = 100 cmHg
P2= ?
T1 = 273 K
T2 = 373 K

("P"_1 "V"_1)/"T"_1 = ("P"_2 "V"_2)/"T"_2

(100 xx"V")/273 = ("P"_2 xx"V")/373

"P"_2 = 136.63  "cm of Hg"

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 21 | Page 127