Can an enzyme make a nonspontaneous reaction occur spontaneously? why or why not?

The correct answer is that an enzyme cannot change a non-spontaneous reaction to a spontaneous one.

Explanation:

Enzymes are proteins that catalyze chemical reactions in living things. They are substances that, without being consumed in a reaction, notably increase their speed.

As with all catalysts, enzymes do not alter the chemical balance of the reaction. Generally, in the presence of an enzyme, the reaction moves in the same direction as it would in the absence of an enzyme, only faster.

So we conclude that an enzyme can only increase the speed of the reaction, not make it spontaneous.

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given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

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