8.00 L of a gas is known to contain 0.789 mol. if the amount of gas is increased to 1.60 mol the new volume will be 8.2 L at an uncharged temperature and pressure

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.