Which statement best describes the compressibility of a gas? increasing the temperature of a gas decreases the pressure. increasing the temperature of a gas increases the pressure. increasing the pressure on a gas decreases the volume. increasing the pressure on a gas increases the volume.

Option (c) is the correct answer.

Explanation:

A gas molecules have high kinetic energy due to which they move rapidly from one place to another. As a result, the molecules are far apart from each other because of weak Vander waal forces.

Therefore, when we compress the gas then molecules become closer to each other and the volume of gas will decrease.

Thus,we can conclude that the statement increasing the pressure on a gas decreases the volume best describes the compressibility of a gas.

answer: mercury

explanation:

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.