Which statements  best  describe gases? check all that apply. the atoms in a gas move at high speeds. the atoms in a gas often get stuck together. the atoms in a gas spread in all directions. gases have a definite shape. gases have a definite volume.

The atoms in a gas move at high speeds.

The atoms in a gas spread in all directions.

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.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.