Answered: Suppose that 3,248 J of heat is removed…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Suppose that 3,248 J of heat is removed from 86.5 grams of octane at an initial temperature of 25.0°C. What is the final temperature? (The specific heat of octane, C8H18(l), is 2.22 J/(g °C).)

Expert Solution

Step 1

Since the heat of any process at constant pressure is given by

Q = mCΔT

where Q = heat given = -3248 J ( -ve since heat is being removed)

m = mass = 86.5 g

C = specific heat = 2.22 J/(g °C)

ΔT = change in temperature = final temperature - initial temperature = T - 25

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