Chapter 5, Problem 9PS

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# The initial temperature of a 344-g sample of iron is 18.2 °C. If the sample absorbs 2.25 kJ of energy as heat, what is its final temperature?

Interpretation Introduction

Interpretation:

The Final temperature of iron at definite mass has to be calculated

Concept Introduction:

Heat energy required to raise the temperature of 1g of substance by 1k.Energy gained or lost can be calculated using the below equation.

q=C×m×ΔT

Where,

q= energy gained or lost for a given mass of substance (m),

C =specific heat capacity

ΔT= change in temperature

Explanation

Given,

Specific heat capacity of iron =0.450J/g.K

â€‚Â Mass of iron =344g

â€‚Â q =2.25KJ

â€‚Â Tinitial=18.2â€‰0Câ€‰=â€‰291.35â€‰K

Substitute values in qâ€‰=â€‰CÃ—mÃ—Î”T, as

â€‚Â 2

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