A piece of unknown substance weighs 55.8 g and requires 1910 J to increase its temperature from 21.7°C to 87.4°C. (a) What is the specific heat (in J/g-°C) of the substance? 4.0 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) O gold Au(s) 0.129 O copper Cu(s) 0.384 O iron Fe(s) 0.449 O argon Ar(g) 0.521 O silicon Si(s) 0.712 O carbon dioxide Co,(0) 0.843 O aluminum Al(s) 0.904 O nitrogen N2(g) 1.039 water H20(1) 4.1801 O helium He(g) 5.196 Type here to search hp 112 fs f6 144 sc & 8 Q E A J K B. FL %24

Question
A piece of unknown substance weighs 55.8 g and requires 1910 J to increase its temperature from 21.7°C to 87.4°C.
(a) What is the specific heat (in J/g-°C) of the substance?
4.0
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)
O gold
Au(s)
0.129
O copper
Cu(s)
0.384
O iron
Fe(s)
0.449
O argon
Ar(g)
0.521
O silicon
Si(s)
0.712
O carbon dioxide
Co,(0)
0.843
O aluminum
Al(s)
0.904
O nitrogen
N2(g)
1.039
water
H20(1)
4.1801
O helium
He(g)
5.196
Type here to search
hp
112
fs
f6
144
sc
&
8
Q
E
A
J
K
B.
FL
%24
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Transcribed Image Text

A piece of unknown substance weighs 55.8 g and requires 1910 J to increase its temperature from 21.7°C to 87.4°C. (a) What is the specific heat (in J/g-°C) of the substance? 4.0 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) O gold Au(s) 0.129 O copper Cu(s) 0.384 O iron Fe(s) 0.449 O argon Ar(g) 0.521 O silicon Si(s) 0.712 O carbon dioxide Co,(0) 0.843 O aluminum Al(s) 0.904 O nitrogen N2(g) 1.039 water H20(1) 4.1801 O helium He(g) 5.196 Type here to search hp 112 fs f6 144 sc & 8 Q E A J K B. FL %24