An insulated Thermos contains 114 cm3 of hot coffee at 69
An insulated Thermos contains 114 cm3 of hot coffee at 69
Homework Answers
Change all
the temp. to Kelvin first. Ice is 0C in solid form so there is a
latent heat too.
4186(114/1000)(342-T)=333x1000x12/1000
+ 4186(12/1000)(T-273)
Solve for
T?
Then
(T-273) is in Celsius.
Difference
= 69 - (T-273)
Energy gained by
ice
= m_ice * (h_sf + cpw*T)
Energy lost by
coffee
= ?_w*V_coffee*cpw*(89 - T)
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