How much heat is absorbed if 45 grams of sweat is evaporated from someone's skin? dhvap for water at body temperature is 2.41 kj/g?

Answer : 108 kJ of heat is absorbed

Explanation :

Enthalpy of vaporization of water at body temperature is 2.41 kJ/g

That means we need 2.41 kJ to evaporate 1 gram of sweat.

Let us use this as a conversion factor to find the amount of heat needed to evaporate 45 grams of sweat.

The equation can be set as follows.

Therefore we can say that 108 kJ of heat is absorbed when sweat is evaporated from someone's skin.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

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.