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  2. Topic
    Chemistry
  3. Study Set
    Chemical Principles Study Set 1
  4. Exam
    Exam 9: Thermodynamics: The Second and Third Laws
  5. Question
    For the Reaction 2C(s)+ 2H<sub>2</sub>(g)\(\rightarrow\) C<sub>2</sub>H<sub>4</sub>(g)\(\Delta\) H<sub>r</sub>\(\circ\) = +523 KJmol<sup>-1</sup> And Reaction
Solved

For the Reaction
2C(s)+ 2H2(g) →\rightarrow→ C2H4(g) Δ\DeltaΔ Hr ∘\circ∘ = +52

Question 51

Question 51

Multiple Choice

For the reaction
2C(s) + 2H2(g) →\rightarrow→ C2H4(g)
Δ\DeltaΔ Hr ∘\circ∘ = +52.3 kJ.mol-1 and Δ\DeltaΔ Sr ∘\circ∘ = -53.07 J.K-1.mol-1 at 298 K.The reverse reaction will be spontaneous at


A) temperatures below 985 K.
B) temperatures above 985 K.
C) temperatures below 1015 K.
D) all temperatures.
E) no temperatures.

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