Read each clue carefully and identify the correct answer. Give a reason for your answer.
Answer variants:
Combination reaction
A suitable base
Neutralisation reaction
Salt
Formic acid
Oxalic acid
Heat
Lime
Moist baking soda
A neutral solution
I am released during many neutralisation reactions.
I cannot be seen but can be felt.
I make the reaction exothermic.
I cannot be seen but can be felt.
I make the reaction exothermic.
Who am I? -