posted by Saarah on .
Define a system and state the significant the enthalpy change for the system. Explain your reasoning?
A) natural gas burning in a furnace
B) melted wax solidifying
You should be able to define the system. For burning natural gas you know it is exothermic (dH is -) and for molten wax solidifying you know it is exothermic (dH is -).