What is the value of change in internal energy at 1 atm in the process?
`H_(2)O(l,323K)rarrH_(2)O(g,423K)`
Given : `C_(v,m)(H_(2)O,l)=75.0JK^(-1) mol^(-1):" "C_(p,m)(H_(2)O,g)=33.314JK^(-1)mol^(-1)`
`DeltaH_(vap)"ar 373 K"=40.7KJ//mol`
What is the value of change in internal energy at 1 atm in the process?
`H_(2)O(l,323K)rarrH_(2)O(g,423K)`
Given : `C_(v,m)(H_(2)O,l)=75.0JK^(-1) mol^(-1):" "C_(p,m)(H_(2)O,g)=33.314JK^(-1)mol^(-1)`
`DeltaH_(vap)"ar 373 K"=40.7KJ//mol`
`H_(2)O(l,323K)rarrH_(2)O(g,423K)`
Given : `C_(v,m)(H_(2)O,l)=75.0JK^(-1) mol^(-1):" "C_(p,m)(H_(2)O,g)=33.314JK^(-1)mol^(-1)`
`DeltaH_(vap)"ar 373 K"=40.7KJ//mol`
A
`42.91kJ//mol`
B
`43086kJ//mol`
C
`42.6kJ//mol`
D
`49.6kJ//mol`
Text Solution
Verified by Experts
The correct Answer is:
C
`C_(V,m)(H_(2)O,g)=33.314-8.314`
`=25"J/K mol"`
`DeltaU_(2)=DeltaH_(2)-Deltan_(g)RT=37.6`
`DeltaU_("total")=DeltaU_(1)+DeltaU_(2)+DeltaU_(3)`
`=C_(v,m)(l).DeltaT+DeltaV_("vap.")+C_(v,m)(g)DeltaT`
`=(75xx50)/(1000)+37.6+(25xx25)/(1000)`
`=42.6"kJ/mol"`
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Find the entropy change when 90 g of H_(2)O at 10^(@) C was converted into steam at 100^(@) C. [Given C_(P)(H_(2)O)=75.29 JK^(-1)mol^(-1) and Delta H_("vap")=43.932 JK^(-1)mol^(-1) ]
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What is the value of change in internal energy at 1 at, in the process H_(2)O (l, 323 K) rarr H_(2)O (g, 473 K) Given : C_(p) (H_(2)O, l)=75.3 JK^(-1) mol^(-1) , C_(p) (H_(2)O, g)=33.314 JK^(-1) mol^(-1), DeltaH_(vap) at 373 K=40.7 kJ//mol
What is the value of change in internal energy at 1 at, in the process H_(2)O (l, 323 K) rarr H_(2)O (g, 473 K) Given : C_(p) (H_(2)O, l)=75.3 JK^(-1) mol^(-1) , C_(p) (H_(2)O, g)=33.314 JK^(-1) mol^(-1), DeltaH_(vap) at 373 K=40.7 kJ//mol
A
`109.1 kJ//mol`
B
`37.6 KJ//mol`
C
`43.86 KJ//mol`
D
`48.36 KJ//mol`
Calculate the change in enthalpy for the following process at 1 atm H_(2)O(1, 50^(@)C) rarr H_(2)O (g, 150^(@)C) given that Delta H_(v) at 100^(@)C is 40.7 kJ mol^(-1) C_(p)(H_(2)O, l) = 75.0 J mol^(-1)K^(-1) C_(p)(H_(2)O, g) = 33.3 J mol^(-1)K^(-1)
Calculate the change in enthalpy for the following process at 1 atm H_(2)O(1, 50^(@)C) rarr H_(2)O (g, 150^(@)C) given that Delta H_(v) at 100^(@)C is 40.7 kJ mol^(-1) C_(p)(H_(2)O, l) = 75.0 J mol^(-1)K^(-1) C_(p)(H_(2)O, g) = 33.3 J mol^(-1)K^(-1)
A
64.8 KJ
B
52.4 KJ
C
48.6 KJ
D
46.1 KJ
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A
`+6008.0 J "mole"^(-1)`
B
`5619.2 J "mole"^(-1)`
C
`-5619.2 J "mole"^(-1)`
D
`6619.2 J K^(-1) mol^(-1)`
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