Question

why we should heat liquid from below​

Answer 1

Boiling occurs when a liquid's molecules have enough energy to break free from surrounding molecules. Think of higher pressure as making that escape more difficult by offering a counteracting force. Water boils under normal atmospheric pressure at 212°F (100°C).

please mark in brainlist and following me

Answer 2

Heat usually goes upwards. try converting a burner downward the flame will always change its direction