2. which of the following statements is false concerning two, pure volatile liquids, each in closed containers of the same size, at the same initial temperature? a) the initial rates of vaporization would increase if the surface areas were increased b) the vapor pressures would increase if the temperature was increased c) the vapor pressure is lower for the liquid with the weaker intermolecular forces d) the vapor pressures would decrease if a salt was added e) if th vapor pressures e liquids have equal molecular weights, they may have different

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

explanation: no but i do not usually comment

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.