read the following reactions. reaction 1: nacl(s) → na+(aq) + cl− reaction 2: n2 + 3h2 → 2nh3 which reaction leads to an increase in entropy? only reaction 1 only reaction 2 both reaction 1 and 2 neither reaction 1 nor 2

The correct answer is: Only Reaction 1.

Explanation:

Ok, let us define what entropy is: entropy is a measure of the random activity in a system, and there are several factors which can affect the amount of entropy in a system - for example when you increase temperature, you increase entropy.

In this case,

Reaction 1: NaCl(s)  → Na+(aq)+Cl- (aq): In this reaction you are solvating the atoms of Na+ and Cl-, or in other words, you are passing a compound from the solid state to the liquid state, which causes the entropy to increase. Liquids have more energy and entropy than solids.

Reaction 2: N2(g) + 3H2(g)  → 2NH3(g): In this case you are getting a gaseous product from gaseous reactants, and although there is positive entropy, it does not increase.

it should be p1 v1 = p2 v2

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