Given that I no not see any explanation in the previos answer, I think you can benefit of this.
Exothermic refers only to the fact that the reaction releases energy in the form of heat when occurs. So, the enthalpy is higher at start and lower and the end.
Seen in this way, you can deduct that the change in enthalpy is negative, which is what the third option says.
The answer is 33 because 40*0.825 or 40*82.5% is 33 men.
Answer - natural
A sequence is a function whose domain is the set of natural numbers.
This will be the answer -37/8 > -4.63
