Asked by micky
If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK.
temperature needed = energy/ mass x specific heat capacity
temperature needed=115800/2*112.85
the temperature needed 246.25∘C
please let me know what's missing.
ty
temperature needed = energy/ mass x specific heat capacity
temperature needed=115800/2*112.85
the temperature needed 246.25∘C
please let me know what's missing.
ty
Answers
Answered by
MathMate
246.25°C is close to the answer, but for the wrong reasons.
E=MC(T2-T1)
E=115800 J
T2=unknown
T1=100 °C
C=386 J/(kg-°K)
Solve for T2.
Note: (T2-T1) should be both in °K, but since it is a difference, it is acceptable to have them both in °C.
E=MC(T2-T1)
E=115800 J
T2=unknown
T1=100 °C
C=386 J/(kg-°K)
Solve for T2.
Note: (T2-T1) should be both in °K, but since it is a difference, it is acceptable to have them both in °C.
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