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# Problem: For the reaction 2 C(s) + 2 H2(g) → C2H4(g)  ∆H°r = +52.3 kJ · mol−1 and ∆S°r =−53.07 J · K−1· mol−1 at 298 K. This reaction will be spontaneous at 1. no temperature.  2. temperatures below 985 K. 3. temperatures above 985 K. 4. temperatures below 1015 K. 5. all temperatures.

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###### Problem Details

For the reaction

2 C(s) + 2 H2(g) → C2H4(g)

∆H°r = +52.3 kJ · mol−1 and ∆S°r =−53.07 J · K−1· mol−1 at 298 K. This reaction will be spontaneous at

1. no temperature.

2. temperatures below 985 K.

3. temperatures above 985 K.

4. temperatures below 1015 K.

5. all temperatures.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Spontaneous Reaction concept. You can view video lessons to learn Spontaneous Reaction. Or if you need more Spontaneous Reaction practice, you can also practice Spontaneous Reaction practice problems.

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Our tutors rated the difficulty ofFor the reaction 2 C(s) + 2 H2(g) → C2H4(g)  ∆H°r = +52.3 ...as medium difficulty.

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Based on our data, we think this problem is relevant for Professor Fakhreddine's class at TEXAS.