The activation energy of an endothermic reaction
must be greater than the required δh
must be less than the required δh
must be equal to the required δh
is not needed for the required δh

must be greater than the required ΔH

Explanation:

The activation energy is the minimum extra amount of energy required by reactant molecules to undergo a reaction.

For both exothermic and endothermic reactions we need activation energy.

Enthalpy is the energy difference between products and reactants.

For endothermic reactions, enthalpy is positive as the energy of products is more than the energy of reactants.

As activation energy will be greater than the energy of both the reactants and products, so it must be greater than the enthalpy of reaction.

it should be p1 v1 = p2 v2

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )