Endothermic and exothermic reactions | Chemical reactions | High school chemistry | Khan Academy

[@sciencenerd7639]

thank you Khan Academy

[@omaralamin4506]

so helpful,and thank u for always providing us free classes.
i understood alot through this video and im ready for my IGCSE chemistry grade 9 exam

[@ThisismeJhabn]

Thanku it is very helpful ❤