1.

Five moles of an ideal gas at300 K, expandedisothermallyfroman intinalpressueof4 atmto a final pressureof 1 atm againsta cont. extpressureof 1 atm . Calculate q ,w, DeltaU & DeltaH. Calculatethe correspondingof allif theaboveprocessis carriedoutreversibly .

Answer»


Solution :`W_("IRR") = - P_("ext")[DeltaV]= -P_("ext")((NRT)/(P_(2))(nRT)/(P_(1)))`
` =- P_("ext") xx nRT [1-(1)/(4)]`
`= 9353.25 J`
`W_("rev") =- 2.303 nRT log .(P_(1))/(P_(2)) = -17288. 47J`
`DeltaU = 0,""DeltaH = 0`


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