y2-2y+6 for y=2is it is power exponent who answer first is the brainliest and I will follow who did first​

Explanation:

By putting the value y = 2 then,

= 4 - 4 + 6. [B.O.D.M.A.S rule] (First addition)

= 4 + 6 - 4

= 10 - 4. (Then subtraction)

= 6

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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