True or false?

an exothermic reaction could be written as:
heat + a + b > ab

False,the given representation of an exothermic reaction is wrong.

Explanation:

Exothermic reaction are those reaction which releases energy in the form of heat into their surroundings. This release of energy leads to rise in temperature of the of surrounding.

Endothermic reaction are those reaction which energy is absorbed from the surroundings. This absorption of energy leads to lowering in temperature of the of surrounding.

a galvanic cell( aka voltaic cell) and electrolytic cell

explanation:

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when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.