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Q.

A certain mass of a dry gas has density 28 at 27°C and 760 mm pressure. Calculate the density of gas at 17°C and 72 cm pressure.

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answer is 27.4.

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Detailed Solution

D1T1P1=D2T2P2D1=28,T1=27+273=300K,P1=760mm;D2=?,T2=17+273=290K,P2=72cm×10mm1cm=720mm.We know that:D1T1P1=D2T2P2;D2=D1T1P1×P2T2=28×300K×720mm760mm×290Kor D2=27.4
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