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Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 9PS: The initial temperature of a 344-g sample of iron is 18.2 C. If the sample absorbs 2.25 kJ of energy...
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24.1 kJ of energy is lost by a 251 g Al block. If the block is initially at 125.0°C what will be its final T in  °C? (sAl = 0.902 J g-1 °C-1)

I need help on what i did wrong on the problem, the problem is on the picture and the second picture is how I did it, please tell me what I did wrong, thank you

A 24.1 kJ of energy is lost by a 251 g aluminum block. If the block is initially at 125.0°C what will be its final temperature? (CA = 0.902 J g1°C1) ´Al
Transcribed Image Text:A 24.1 kJ of energy is lost by a 251 g aluminum block. If the block is initially at 125.0°C what will be its final temperature? (CA = 0.902 J g1°C1) ´Al
-24.1(1000)=251(0.902)(Tf-125C) -24100=2264.02(Tf) - 125(2264.02) -24100+125 (2264.02)=2264.02(Tf) 258902.5=2264.02Tf Tf=114 Celcius
Transcribed Image Text:-24.1(1000)=251(0.902)(Tf-125C) -24100=2264.02(Tf) - 125(2264.02) -24100+125 (2264.02)=2264.02(Tf) 258902.5=2264.02Tf Tf=114 Celcius
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