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kalupahana
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Homework Statement
A balloon with a constant volume is in 1000C. The fraction of gas flow out of balloon when temperature increased by 20C is nearly equal to
(consider pressure and the gas in balloon is ideal)
a. 2/373
b. 2/375
c. 2/100
d. 373/375
e. 100/102
Homework Equations
PV=nRT
P-pressure
V-volume
n-number of mols
R-universal gas constant
T-temperature
The Attempt at a Solution
In these conditions P,n & R is constant
∴ V α T
V1/V2=T1/T2
V1/V2=375/373
the amount flow out = 375/373-1 = 2/373
but the answer given as as 2/375
the book i get this considered the mass is increasing when temperature increases
in book that was like
PV=(m/M)RT
P,V,M and constant (m-mass of gas, M-molar mass)
m α 1/T
m1T1=m2T2
m1/m2=373/375
the mass flow out = 1-373/375=2/375
which is right