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Ivan
3 years ago
10

Chemical energy comes from... 1. chemical change 2. physical change

Chemistry
2 answers:
solmaris [256]3 years ago
4 0

Answer:

1

Explanation:

Physical change does not cause chemical energy.

Snowcat [4.5K]3 years ago
4 0
Chemical change Yw btw
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(a) Part 1: S_N1 reaction. This is a nucleophilic substitution reaction in which we have two steps. Firstly, chlorine, a good leaving group, leaves the carbon skeleton to form a relatively stable secondary carbocation. This carbocation is then attacked by the hydroxide anion, our nucleophile, to form the final product.

To summarize, this mechanism takes places in two separate steps. The mechanism is attached below.

Part 2: S_N2 reaction. This is a nucleophilic substitution reaction in which we have one step. Our nucleophile, hydroxide, attacks the carbon and then chlorine leaves simultaneously without an intermediate carbocation being formed.

The mechanism is attached as well.

(b) The rate determining step is the slow step. Formation of the carbocation has the greatest activation energy, so this is our rate determining step for S_N1. For S_N2, we only have one step, so the rate determining step is the attack of the nucleophile and the loss of the leaving group.

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brainly.com/question/8581600#respond
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