Why Do Spontaneous Reactions Occur? #chemistry #thermodynamics #neet #jee

Added: 2026-05-22

[00:00:01]Spontaneity.

[00:00:05]A spontaneous process is called an irreversible process. [music] To reverse it, we need help from outside agencies.

[00:00:13]This is called the spontaneity of thermochemical equations.

[00:00:18]A chemical reaction [music] happens spontaneously in a direction where energy decreases. If that is true, then all reactions should be exothermic.

[00:00:27][music] Example.

[00:00:30]1/2 N2 + 3/2 H2 [music] gives NH3.

[00:00:36]Delta RH theta [music] is equal to -46.1 kJ per mole inverse.

[00:00:44]>> [music]