(Ans. 320 cm)
4. At a constant temperature, volume of a gas
was found to be 400 cm at a pressure of
760 mm Hg. If the pressure of the gas is
increased by 25%, find the new volume.
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Answer:
v=320
Explanation:
at constant temperature
Boyle's law
PV=k
v1=400cm^3 = 400
p1 =p= 760mm
p2=p+25p/100 =5p/4
p1v1=p2v2
pv1 =5p/4v2
v1= 5v2/4
5v2=4v1
v2= 4v1/5
v2= 4×400/5
v2= 1600/5
v2= 320cm^3
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