ThermoChemistry

Dissolving ammonium salt in water will cause a ___________ in surrounding temperature

• increase

• higher

• drop

• constant

Respiration, bomb explosion and neutralisation of acid with alkali are the examples of _______________ reactions

• exothermic

• endothermic

• precipitation

An exothermic reaction

• absorbs heat

• releases heat

• produces sugar

• is really endothermic

An endothermic reaction

• releases heat

• absorbs heat

• produces fuel

• produces oxygen

_____ reactions usually feel hot!

• endothermic

• exothermic

____ reactions usually feel cold.

• endothermic

• exothermic

During an exothermic reaction, heat is _________ and chemical bonds __________.

• released, formed

• absorbed, broken

• released, broken

• absorbed, formed

During an endothermic reaction, heat is ________ and chemical bonds _______.

• released, formed

• absorbed, broken

• released, broken

• absorbed, formed

Exo means out or ________.

• absorbed

• released

'Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?'

• It is an exothermic reaction
• It is an endothermic reaction
• It is made of ice
• It is dissolving your mouth