Question

If a chemical reaction is reversed, what happens to the enthalpy of the reaction?
The enthalpy of the reaction becomes zero.

The enthalpy of the reaction doubles.

The sign of the enthalpy of the reaction reverses.

The enthalpy of the reaction is halved

Answer 1

Hess' Law: reversing an equation means reversing the sign on the enthalpy value.

Answer 2

https://en.wikipedia.org/wiki/Hess%27s_law

Answer 3

so its C?

Answer 4

yes c bc lets say the reaction did -5 so it provided energy but younreversed it taking up energy so the sign will reverse to positive

Answer 5

Thank you :)