Question

Which of the following is an example of an endothermic process?

moisture forming on a glass of iced water

burning gasoline in a combustion engine

a package of fruit freezing in a freezer

a chocolate bar melting in hot car

Answer 1

"Endo" essentially means inward, and "thermic" means reaction in this case.
Therefore, I'ma eliminate some options. It's not moisture on a glass of iced water. It's not a package of freezing fruit, but I'll give you another hint as to which of the last two it is.

When we think of reactions in Chemistry, we think of them in a Substance. Not in a mixture. In this case, burning gasoline in an engine is a mixture because the entire engine isn't anywhere close to a colloid or solution. Chocolate bars, on the other hand...

Answer 2

a chocolate bar melting in hot car is it !
I thought that endothermic means absorbing heat is melting chocalte bar absorbing heat, o yea maybe

Answer 3

Thank you !! :)

Answer 4

Sure thing! c: