Which of the following is correct for C(graphite) + O _2 (gas) CO _2 (gas) , heat =-348 kJ? [OJEE 2006]

JEE Main Chemistry question

Which of the following is correct for , heat kJ? [OJEE 2006]

(A)Heat absorbed
(B)Mass of product > Mass of reactant
(C)Mass of product < Mass of reactant
(D)Mass of product = Mass of reactantCorrect

Answer: (D)

Solution

The negative sign shows heat is released (exothermic), ruling out option (a). By the law of conservation of mass, the total mass of products must equal the total

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Question ID VK-130470