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What is the density of propane, C(3)H(8)...

What is the density of propane, `C_(3)H_(8)`, at `25^(@)C` and 740 mmHg?

A

`0.509 gL^(-1)`

B

`0.570gL^(-1)`

C

`1.75 gL^(-1)`

D

`1.96gL^(-1)`

Text Solution

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The correct Answer is:
C
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The standard Gibb's energy change for the formation of propane. C_(3)H_(8) (g) at 298 K is [Delta_(f)H^(theta) for propane =-103.85 kJ" mole"^(-1), S^(theta)._(m)C_(3)H_(8)(g)=270.2J.K^(-1) mol^(-1), S^(theta)._(m)H_(2)(g)=130.68J.K^(-1) mol^(-1) . and S^(theta)._(m)C_("(graphite)")=5.74JK^(-1) mol^(-1)]

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A 3 L gas mixture of propane (C_(3)H_(8)) and butane (C_(4)H_(10)) on complete combustion at 25 C produced 10 L CO_(2.) Assuming constant P and T conditions what was volume of butane present in initial mixture?

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