91影视

The heat required to raise the temperature of a substance is given by the formulaQ = C 脳 m 脳鈭� T,where 鈥淐鈥� is the specific heat of the substance, 鈥渕鈥� is the mass of the substance, and 鈥溾垎T鈥� is the change in the temperature of the substance.

We know from the given details that:

\(\Delta \)T = \({T_{final}} - {T_{initial}} = {68.9^0}C - {19.3^0}C = {49.6^0}C\)

m = 437.2 g

Q = 8460 J

By putting the values above in the equation Q = C 脳 m 脳鈭� T, we get 8460 = 437.2\( \times \)49.6\( \times \)C.

\(\begin{array}{c}C = \frac{{8460}}{{437.2 \times 49.6}}\\ = 0.39\frac{J}{{{g^0}C}}\end{array}\)

Thus, the specific heat of the substance is \(0.39\frac{J}{{{g^0}C}}\).

The specific heat of a substance is a constant value. If the value of specific heat matches table 5.1, it most likely resembles copper (Cu).