Question

A chemist measures the energy change AH during the following reaction: CH4(9)+202(9) + CO2(9)+2H2O(1) AH= -882. kJ Use the information to answer the following questions. This reaction is... ОО endothermic. exothermic. Yes, absorbed. Yes, released. Suppose 33.5 g of CH4 react. X 5 ? Will any heat be released or absorbed? No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your answer to 3 significant digits.

Answer 1

An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction.

ΔH is negative

so first answer is reaction is exothermic

Answer 2

33.5 g of CH₄ react that means

number of moles of CH₄ = given mass / molecular mass

so molecular mass of CH₄ = 12+ 4 = 16

so number of moles = 33.5 / 16 = 2.09375 moles

so that means if one moles of CH₄ reacts and release a heat of 882 KJ so 2.09375 moles of CH₄ will release heat of 2.09375*882 KJ = 1846 KJ

that means heat will release

Answer 3

as we have find it earlier the answer is 1846 KJ so converting it inti 3 significants digit =  1.84 * 10³ KJ

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