Cup | Specific heat capacity of spoon (J / g oC) | Mass of spoon (g) | Initial temperature of spoon (oC) |
---|---|---|---|
A | 0.90 | 7.0 | 20 |
B | 0.39 | 20.0 | 20 |
C | 0.84 | 15.0 | 20 |
D | 0.24 | 25.0 | 20 |
Four identical 300 mL cups of fresh brewed coffee, originally at 91 °C, were stirred with different spoons, as listed in the table above.
In which cup will the temperature of the coffee be highest at thermal equilibrium?
(Assume that the heat lost to the surroundings is negligible.)
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