Can someone help me with this, please? Given the following reaction equation for the synthesis of Phosphorus Trichloride. Is the reaction endothermic or exothermic?
P4(s) + 6 Cl2(g) → 4 PCl3(g) + 1152 kJ

Exothermic because heat energy is a product.

Endothermic because heat energy is a product.

Endothermic because heat energy is a reactant.

Exothermic because heat energy is a reactant.

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Which of the following molecules is polar? c3h7oh c2h5cooh

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.