A piece of aluminum metal weighing 3g requires 5.4J of heat to raise the temperature from 298k. Calculate heat capacity, specific heat capacity, molar heat capacity.
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1) No.of moles of Al(m)=
(27gmol
−1
)
60g
=2.22mol
2) Molar heat capacity(c)=24Jmol
−1
K
−1
Rise in temperature ΔT=55–35
=20K
3) Heat evolved (q) =C×m×T
=(24Jmol
−1
K
−1
)×(2.22mol)×(20K)
=1065.7J
=1.06kJ
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