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Answer in General Chemistry for taiya #149844

Author:
March 18th, 2023

First calculate the amount of heat needed to increase the temperature of a 333-gram block of iron from 22⁰C to 1300⁰C:

“Q = cmDelta T = 0.49 * 333 * (1300-22) = 208531 (J) = 208.5 (kJ)”

If 3 moles of NO2 are needed to produce 138 kJ of heat, then calculate the amount of NO2 needed to produce 208.5 kJ of heat:

“nu = 208.5*3/138 = 4.53 (mol)”

Answer: 4.53 moles of NO2 are needed to increase the temperature of a 333-gram block of iron from 22⁰C to 1300⁰C.

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