Home
Class 11
CHEMISTRY
Calculate the entropy change at 298K for...

Calculate the entropy change at `298K` for the reaction
`Br_(2)(l) +CI_(2)(g) rarr 2BrCI(g)`
`DeltaH = 29.3 kJ at 298K`. The entropies of `Br_(2)(l), CI_(2)(g)`, and `BrCI(g)` at the above temperature and `152.3, 223.0` and `239.7 J mol^(-1)K^(-1)` respectively.

Text Solution

Verified by Experts

For the reaction,
`DeltaH = 29.3 kJ = 29300J`
`DeltaS = S ("products") -S ("reactants")`
`= 2xxS (BrCI) -[S(Br_(2))+S(CI_(2))]`
`= 2 xx 239.7 - [152.3 +223.0]`
`= 479.4 - 375.3`
`= 104.1J`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Ex 6.5|30 Videos

  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Exercises (Subjective)|70 Videos

  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Ex 6.3|27 Videos

  • STOICHIOMETRY

    CENGAGE CHEMISTRY|Exercise Archives Subjective|33 Videos

Similar Questions

Explore conceptually related problems

Calculate the free energy change at 298 K for the reaction, Br_(2)(l)+ Cl_(2)(g) rarr 2BrCl(g) . For the reaction DeltaH^(@)=29.3 KJ & the entropies of Br_(2)(l),Cl_(2)(g) & BrCl(g) at the 298 K are 152.3,223.0,239.7 J "mol^(-1)K^(-1) respectively.

Calculate the free energy change at 298 K for the reaction , Br_(2)(l)+Cl_(2)(g)to2BrCl(g) . For the reaction DeltaH^(@)=29.3kJ & the entropies of Br_(2)(l),Cl_(2)(g)&BrCl(g) at the 298 K are 152.3, 223.0, 239.7 J mol^(-1)K^(-1) respectively.

Calculate the free eneryg change at 298 K for the reaction , Br_(2)(l)+Cl_(2)(g) to BrCl(g) . For the reaction DeltaH^(@)=29.3 kJ &

The enthalpy change (Delta H) for the reaction N_(2) (g)+3H_(2)(g) rarr 2NH_(3)(g) is -92.38 kJ at 298 K . What is Delta U at 298 K ?

The enthalpy change (DeltaH) for the reaction, NH_(2(g))+3H_(2(g)) rarr 2NH_(3g) is -92.38kJ at 298K What is DeltaU at 298K ?

Calculate the standard enegry change for the reaction: OF_(2)(g) +H_(2)O(g) rarr O_(2)(g) +2HF(g) at 298K The standard enthalpies of formation of OF_(2)(g), H_(2)O(g) , and HF(g) are +20, -250 , and -270 kJ mol^(-1) , respectively.

Calculate the entropy of Br_(2)(g) in the reaction H_(2)(g)+Br_(2)(g)rarr2HBr(g), Delta S^(@)=20.1 JK^(-1) given, entropy of H_(2) and HBr is 130.6 and 198.5 J mol^(-1)K^(-1) :-