Question

I need to know if these are endothermic or exothermic reactions

Combining baking soda and vinegar
Antacid and water
Chalk and vinegar
Yeast and hydrogen peroxide

Answer 1

i) Baking Soda - Base
Vinegar - Acid

Base + Acid --> Salt + Water (Neutralization Reactions)

Remember that All Neutralization reactions are "Exothermic"

So, Baking Soda + Vinegar is also Exothermic

Similarly, try to understand the other reactions and conclude whether they are exothermic or endothermic. (Most of them are actually based on the experiments - you might have done in your classes)

A resource to study from :

http://ghsacceleratedchemistry.weebly.com/uploads/1/0/5/4/10549360/endothermic_versus_exothermic_reactions.pdf