Based on Gay-Lussac's law, which of the following statements is true for an ideal gas at constant volume and mole amount?

A. The number of collisions is independent of pressure.

B. The number of collisions decreases with increase in pressure.

C. Pressure is directly proportional to the absolute temperature.

D. Pressure is inversely proportional to the absolute temperature.

Option C. Pressure is directly proportional to the absolute temperature.

Explanation:

The ideal gas equation is given as:

PV = nRT

P = nRT/ V

Since n and V are constant, it means that P will be directly proportional to the absolute temperature

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.

c, liquids evaporate, creating a gas