Home
Class 11
CHEMISTRY
Calculate the heat produced (in kJ) when...

Calculate the heat produced (in kJ) when 224 gm of CaO is completely converted to `CaCO_(3)` by reaction with `CO_(2)` at `27^(@)` in a container of fixed volume.
Given : `DeltaH_(f)^(@)(CaCO_(3),s)=-1207kJ//mol," "DeltaH_(f)^(@)(CaO,s)=-635kJ//mol`
`DeltaH_(f)^(@)(CO_(2),g)=-394kJ//mol,["Use R"=8.3JK^(-1)mol^(-1)]`

A

`702.04` kJ

B

`721.96` kJ

C

712 kJ

D

721 kJ

Text Solution

Verified by Experts

The correct Answer is:
A
`CaO(s)+CO_(2)(g)rarrCaCO_(3)(s)`
`Delta_(f)H^(@)=DeltaH_(f)^(@)(CaCO_(3))-DeltaH_(f)^(@)(CaO)-DeltaH_(f)^(@)(CO_(2))`
`=-1207 -(-635)-(-394)`
=-178 kJ/mol
`thereforeDeltaU=DeltaH-Deltan_(g)RT`
`DeltaU=-178-((-1)xx8.3 xx300)/(1000)`
=-175.51 kJ
`n_(CaO)=(224)/(56)=4`
`thereforeq_(v)=n.Delta_(r)U=4xx(-175.51)`
=-702.04 kJ
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|6 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.31 To Q.60)|2 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|20 Videos

Similar Questions

Explore conceptually related problems

The S-S bond energy is if DeltaH_(f)^(@)(E_(t)-S-E_(t))=-147kJ//mol,DeltaH_(f)^(@)(E_(t)-S-S-E_(t))=-202kJ//mol and DeltaH_(f)^(@)S(g)=+223 kJ//mol:

Calculate P-Cl bond enthalpy Given : Delta_(r)H(PCl_(3),g)=306kJ //mol DeltaH_("at omization")(P,s)=314kJ//mol , Delta_(r)H(Cl,g)=121kJ//mol

Calculate the standard enthalpy of reaction ZnO(s)+CO(g)rarrZn(s)+CO_(2)(g) Given, Delta H_(f)(ZnO,s)=-350KJ//"mole",DeltaH_(f)^(@)(CO_(2),g)= -390KJ//"mole", DeltaH_(f)^(@)(CO,g)=-110KJ//"mole"

Calculate the DeltaH_(f)^@ of C_(6)H_(12)O_(6) (s) from the following data: DeltaH_(comb)[C_(6)H_(12)O_(6)(s)]=-2816.kJ//mol DeltaH_(f)^(@) of CO_(2)(g)=-393.5kJ//mol DeltaH_(f)^(@) of H_(2)O(l)=-285.9kJ//mol

Calculate the standard enthalpy of solution of AgCl(s) in water DeltaH_(f)^(0)(AgCl,s)= -127.07kJ mol^(-1), Delta H_(f)^(0)(Ag^(+),aq)=105.58 kJ mol^(-1),DeltaH_(f)^(0)(Cl^(-),aq)= -167.35 kJ mol^(-1)

Determine the enthalpy of formation of B_(2)H_(6) (g) in kJ/mol of the following reaction : B_(2)H_(6)(g)+3O_(2)(g)rarrB_(2)O_(3)(s)+3H_(2)O(g) , Given : Delta_(r )H^(@)=-1941 " kJ"//"mol", " "DeltaH_(f)^(@)(B_(2)O_(3),s)=-1273" kJ"//"mol," DeltaH_(f)^(@)(H_(2)O,g)=-241.8 " kJ"//"mol"

Calculate DeltaG_(reaction) ("kJ"//"mol") for the given reaction at 300 K A_(2)(g)+B_(2)(g)hArr2Ab(g) and at particle pressure of 10^(-2) bar and 10^(-4) Given : Delta H_(f)^(@) AB =180 kJ//mol," "DeltaH_(f)^(@) A_(2)=60 kJ//mol Delta H_(f)^(@) B_(2) = 29.5 kJ//mol," "DeltaS_(f)^(@) AB=210 J//K-mol Delta S_(f)^(@) A_(2) = 190 kJ//mol," "DeltaS_(f)^(@) B_(2)=205 J//K-mol Use : 2.303 Rxx300=5750 "J"//"mole"