What best explains why a person can become sunburned by spending too much time at the beach? sunlight is an electromagnetic wave that gains energy as it travels through air to reach the person. sunlight is an electromagnetic wave carrying energy that is absorbed by the skin. sunlight is a mechanical wave that vibrates the skin particles to produce heat. sunlight is a mechanical wave, and its frequency matches the natural frequency of skin to make heat.

Sunlight is an electromagnetic wave carrying energy that is absorbed by the skin.

Explanation:

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.