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Question
Calculate the following:
The volume at s.t.p. occupied by a gas ‘Z’ originally occupying 1.57 dm3 at 310.5K and 75 cm. press. of Hg.
Solution
Initial conditions
V1 = 1.57 dm3
P1 = 75 cm
T1 = 310.5 K
Final conditions
V2 = ?
P2 = 76 cm
T2 = 273 K
Using gas equation `("P"_1"V"_1)/"T"_1 = ("P"_2"V"_2)/"T"_2`
`therefore "V"_2 = ("P"_1"V"_1"T"_1)/("T"_1"P"_2)`
`= (75 xx 1.57 xx 273)/(310.5 xx 76) = 1.36 "dm"^3`
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