6
QuizMultiple Choice

Energy in Chemical Reactions — Test

Question 6 • Chemistry

Complete combustion of a 0 point 3 5 0 g sample of a compound in a bomb calorimeter releases 14 point 0 kJ of heat. The bomb calorimeter has a mass of 1 point 2 0 kilograms and a specific heat of 3 point 5 5 the fraction with numerator cap j and denominator open paren g times degree cap c close paren If the initial temperature of the calorimeter is 22 point 5 times degree C , what is its final temperature? Use q is equal to m cap c sub p triangle cap t

Answer
A
19 point 2 times degree C
B
34 point 2 times degree C
C
72 point 3 times degree C
D
25 point 8 times degree C

Explanation

The calorimeter absorbs the 14.0 kJ released by combustion, so use q = 14,000 J. Convert its mass to 1,200 g, then calculate the temperature change: ΔT = q/(mc) = 14,000/(1,200 × 3.55) ≈ 3.29°C. Add this rise to the initial temperature, 22.5°C + 3.29°C ≈ 25.8°C, so the final temperature is 25.8°C.

AI-written and checked against the verified answer.

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