The original temperature of the copper is 145.4 °C
Temperature refers to the degree of hotness or coldness of a body. Now we know that the heat lost by the copper is equal to the heat gained by the water. The heat lost is negative while the heat gained is positive.
Hence;
-(mcdT)= mcdT
-(80.0 * 0.20 ( 26.9 - T)) = 100 * 4.12 * (26.9 - 22.3 )
-(430.4 - 16T) = 100 * 4.12 * (26.9 - 22.3 )
-430.4 + 16T = 1895.2
T = 1895.2 + 430.4 /16
T = 145.4 °C
The temperature of the copper is 145.4 °C.
Learn more about temperature:https://brainly.com/question/11464844?
#SPJ1