Chemical reactions in deoth

Question 1

Is photosynthesis endothermic or exothermic explain why?

Answer 1

Endothermic because light energy from the sun is required for the reaction to proceed.

Question 2

Is respiration endothermic or exothermic

Answer 2

Exothermic because the process of glucose bieng broken down results in a release of energy

Question 3

In exothermic reactions the products have **** energy than the reactants

Answer 3

Less

Question 4

In endothermic reactions the products have **** energy than reactants

Answer 4

More

Question 5

define acids

Answer 5

A substance that releases h+ ions

Question 6

define bases

Answer 6

A substance that releases OH- ions

Question 7

Neutralisation reactions

Answer 7

Acid+ Base= salt + water

Question 8

Acid+metal reactions

Answer 8

acid+metal=salt+hydrogen

Question 9

Metal+oxygen reactions

Answer 9

Metal+oxygen= Metal oxide

Question 10

Combustion reaction

Answer 10

Hydrocarbon+oxygen= Carbon dioxide+water

Question 11

Incomplete combustion

Answer 11

Hydrocarbon + Limited oxygen= Carbon monoxide +carbon+water