91影视

The heat required to raise the temperature of a substance is given by the formula Q = 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:

C = 2.093 J/g 掳C(Table 5.1)

m = 28.4 g

\(\Delta \)T = change in temperature =\({T_{final}} - {T_{initial}} = \) -1\(^\circ C\) 鈥� ( - 23\(^0C\) ) = 22\(^0C\)

By putting the values above in the equation Q = C 脳 m 脳 鈭� T, we get

Q = 2.093\( \times \)28.4\( \times \)22 = 130.77 J.

The heat required to raise the temperature of 28.4 g of ice cube = 130.77 J

Also,

1 calorie = 4.184 J.

The heat required to raise the temperature in calories =\(\frac{{130.77}}{{4.186}} = 31.24cal\)