Which describes the enthalpy change associated with an endothermic reaction?
it is negative because the enthalpy of the products is greater than the enthalpy of the reactants.
it is positive because the enthalpy of the products is greater than the enthalpy of the reactants.
it is negative because the enthalpy of the reactants is greater than the enthalpy of the products.
it is positive because the enthalpy of the reactants is greater than the enthalpy of the products.

It is positive because the enthalpy of the products is greater than the enthalpy of the reactants.

Explanation:

1) Per definition, enthalpy of the reaction = enthalpy change

2) Per definition,

enthalpy change = ∑ enthalpy of the products - ∑ entalphy of the reactants

3) Per definition, endothermic reaction ⇒ heat is absorbed

4) heat absorbed ⇒ ∑ enthalpy of the products > ∑ entalphy of the reactants

5) ∑ enthalpy of the products > ∑ entalphy of the reactants ⇒

∑ enthalpy of the products - ∑ entalphy of the reactants > 0

6) ⇒ enthalpy change > 0

Therefore, it has been shown that enthalpy change in and endothermic reaction is positive since the enthalpy of the products is greater than the enthalpy of the reactants.

it is letter B

It is positive because the enthalpy of the products is greater than the enthalpy of the reactants.

you're welcome

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.