Problem: Which of the following is an example of endothermic reaction?A. C2H2 + 2 H2 → CO2; ΔE = –314.0 kJB. C + O2 → CO2; ΔE = –393.5 kJC. N2 + O2 → 2 NO; ΔE = 180.5 kJD. 2 H2 + O2 → 2 H2O; ΔE = –571.8 kJ

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We’re being asked to determine which of the given reactions is endothermic.


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Exothermic reactions

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Problem Details

Which of the following is an example of endothermic reaction?

A. C2H2 + 2 H2 → CO2; ΔE = –314.0 kJ

B. C + O2 → CO2; ΔE = –393.5 kJ

C. N2 + O2 → 2 NO; ΔE = 180.5 kJ

D. 2 H2 + O2 → 2 H2O; ΔE = –571.8 kJ

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