A piece of unknown substance weighs 58.0 g and requires 1490 J to increase its temperature from 22.6°C to 89.5°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) lead Pb(s) 0.127 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 oxygen O2(g) 0.919 nitrogen N2(g) 1.039 water H2O(l) 4.1801 helium He(g) 5.196
A piece of unknown substance weighs 58.0 g and requires 1490 J to increase its temperature from 22.6°C to 89.5°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) lead Pb(s) 0.127 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 oxygen O2(g) 0.919 nitrogen N2(g) 1.039 water H2O(l) 4.1801 helium He(g) 5.196
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 10E: A piece of unknown substance weighs 44.7 g and requires 2110 J to increase its temperature from 23.2...
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A piece of unknown substance weighs 58.0 g and requires 1490 J to increase its temperature from 22.6°C to 89.5°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) |
|---|---|---|
| lead | Pb(s) | 0.127 |
| 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 |
| oxygen | O2(g) | 0.919 |
| nitrogen | N2(g) | 1.039 |
| water | H2O(l) | 4.1801 |
| helium | He(g) | 5.196 |
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