Br2(l) boiling point 58.8℃ ΔH_vap 29.6 kJ/mol entropy

Br2(l) boiling point 58.8℃ ΔH_vap 29.6 kJ/mol entropy

 

 

The normal boiling point of Br2(l) is 58.8℃,

and its molar enthalpy of vaporization is ΔH_vap = 29.6 kJ/mol.

 

a) When Br2(l) boils at its normal boiling point,

does its entropy increase or decrease?

 

b) Calculate the value of ΔS

when 1.50 mol of Br2(l) is vaporized at 58.8℃.

ΔS = (answer in J/K)

 

---------------------------------------------------

▶ 참고: 상변화에 따른 엔트로피 [ https://ywpop.tistory.com/10703 ]

▶ 참고: 물의 상변화에 따른 ΔS [ https://ywpop.tistory.com/3040 ]

---------------------------------------------------

 

a) When Br2(l) boils at its normal boiling point,

does its entropy increase or decrease?

 

액체 → 기체 상변화 이므로,

엔트로피(= 무질서도)는 증가한다.

increase. ΔS > 0

 

 

 

[ 관련 예제 https://ywpop.tistory.com/5358 ] ΔS의 정성적 예측