A 360-g piece of rebar (a steel rod used for reinforcing concrete) is dropped into 425 mL of water at 24.0 °C. The final temperature of the water was measured as 42.7 °C. Calculate the initial temperature of the pieceof rebar. Assume the specific heat of steel is approximately the same as that for iron (Table 5.1), and that all heat transfer occurs between the rebar and the water (there is no heat exchange with the surroundings). Specific Heats of Common Substances at 25 °C and 1 barSpecific Heats of Common Substances at 25 °C and 1 barSubstanceSymbol (state)Specific Heat (J/g °C)SubstanceSymbol (state)Specific Heat (J/g °C)heliumHe(g)5.193air1.007waterH2O(1)4.184охудenO2(g)0.918ethanolC2H6O(1)2.376aluminumAl(s)0.897iceH20(s)2.093 (at -10 °C)carbon dioxideCO2(g)0.853water vaporH2O(g)1.864argonAr(g)0.522nitrogenN2(g)1.040ironFe(s)0.449copperCu(s)0.385leadPb(s)0.130goldAu(s)0.129siliconSi(s)0.712

Given: Mass of rebar = 360 g Volume of water = 425 mL…

Answered: Specific Heats of Common Substances at…

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter7: Chemical Energy

Section: Chapter Questions

Problem 109AE: A sample of nickel is heated to 99.8C and placed in a coffee-cup calorimeter containing 150.0 g...

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A 360-g piece of rebar (a steel rod used for reinforcing concrete) is dropped into 425 mL of water at 24.0 °C. The final temperature of the water was measured as 42.7 °C. Calculate the initial temperature of the piece
of rebar. Assume the specific heat of steel is approximately the same as that for iron (Table 5.1), and that all heat transfer occurs between the rebar and the water (there is no heat exchange with the surroundings).

Specific Heats of Common Substances at 25 °C and 1 bar
Specific Heats of Common Substances at 25 °C and 1 bar
Substance
Symbol (state)
Specific Heat (J/g °C)
Substance
Symbol (state)
Specific Heat (J/g °C)
helium
He(g)
5.193
air
1.007
water
H2O(1)
4.184
охудen
O2(g)
0.918
ethanol
C2H6O(1)
2.376
aluminum
Al(s)
0.897
ice
H20(s)
2.093 (at -10 °C)
carbon dioxide
CO2(g)
0.853
water vapor
H2O(g)
1.864
argon
Ar(g)
0.522
nitrogen
N2(g)
1.040
iron
Fe(s)
0.449
copper
Cu(s)
0.385
lead
Pb(s)
0.130
gold
Au(s)
0.129
silicon
Si(s)
0.712

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