Answered: 1. How much heat, in joules and in…

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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1. How much heat, in joules and in calories, must be added to a 75.3 g chromium block with a specific heat of 0.450 J/g·°C to increase its temperature from 25°C to its melting temperature of 1907°C?

J = cal =

2. A piece of unknown substance weighs 45.9 g and requires 2730 J to increase its temperature from 23.1°C to 88.9°C.

(a) What is the specific heat (in J/g·°C) of the substance?

J/g·°C

(b) If it is one of the substances found in the table below, what is its likely identity?

Specific Heats of Common Substances at 25°C and 1 bar

Substance	Symbol (state)	Specific Heat (J/g·°C)
gold	Au(s)	0.129
copper	Cu(s)	0.384
iron	Fe(s)	0.449
argon	Ar(g)	0.521
silicon	Si(s)	0.712
carbon dioxide	CO₂(g)	0.843
aluminum	Al(s)	0.904
nitrogen	N₂(g)	1.039
water	H₂O(l)	4.1801
helium	He(g)	5.196

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