The mass of a litre of dry air at N.T.P is 1.293
g. Find the mass of 3 litres of air at 117°C and
a pressure of 4 atmospheres ?
1) 10.86 g
2) 5.6 g
3) 6.4 g
4) 7.2 g
Answers
Answered by
23
The mass of a litre of dry air at N.T.P is 1.293g. Find the mass of 3 litres of air at 117°C and a pressure of 4 atmospheres ?
answer : option (1) 10.86g
explanation : The mass of one litre of dry air at NTP , m = 1.293g
at NTP, temperature, T1 = 273K , pressure , P1 = 1atm and given, volume of dry air , V = 1L
we have to find mass of air
when pressure of air , P2 = 4atm
volume of air, V2 = 3Litre
and temperature , T = 117°C = 390K
using formula, P1V1/m1T1 = P2V2/m2T2
or, (1atm × 1L)/(1.293g × 273K) = (4atm × 3L)/(m2 × 390K)
or, 1/(1.293 × 273) = 12/(390m2)
or, m2 = (1.293 × 273 × 12)/390
= 10.86 g
hence mass of air is 10.86g
Answered by
5
Answer:
10.86
Explanation:
1.293×273×12/390
10.86
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