HomeLearn Fast select Course
Show Unit/ChapterChange UnitChange SubjectLast Menu
NEET-XI-Chemistry

06: Chemical Thermodynamics

 page 2
Qstn# 22 Prvs-Qstn
  • #22
    Calculate the entropy change in surroundings when 1.00 mol of H2O(l) is formed under standard conditions. ΔfHθ = -286 kJ mol-1.
    Ans : It is given that 286 kJ mol-1 of heat is evolved on the formation of 1 mol of H2O(l). Thus, an equal amount of heat will be absorbed by the surroundings.

    qsurr = +286 kJ mol-1

    Entropy change (ΔSsurr) for the surroundings =



    ΔSsurr = 959.73 J mol-1 K-1