In a potential energy diagram for an endothermic reaction?

Question

The answer options are:
1. Heat of reaction is negative.
2. Activation energy is positive.
3. The activation energy for the reverse reaction is smaller than that for the forward reaction.
4. Energy of products is lower than the energy of the reactants

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Answer 1 · 2018-03-03T15:41:07

2. and 3. are true.

Here is a potential energy diagram for an endothermic reaction.

1. False

#Δ_text(r)H = H_text(products) - H _text(reactants) > 0#

2. True

#E_text(a) = E_text(activated complex) - E_text(reactants) > 0#

3. True

The red arrow in the diagram represents #E_text(a, reverse)#.

#E_text(a, reverse) < E_text(a, forward)# because #E_text(products) > E_text(reactants)#

4. False

#E_text(products) > E_text(reactants)#