To heat 12.4g of water from 20.0^ºC to 25.0^ºC requires A)1040 J B)1300 J C)259 J D)1050 J

Question

Quizplus · Accepted Answer

The amount of heat (q) required to change the temperature of a substance can be calculated using the formula q = mcΔT, where m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature. For water, the specific heat capacity (c) is approximately 4.18 J/gºC. Given that the mass (m) of the water is 12.4g and the temperature change (ΔT) is 25.0ºC - 20.0ºC = 5.0ºC, the heat required can be calculated as follows:q = mcΔT = 12.4g * 4.18 J/gºC * 5.0ºC = 259.16 JRounding to three significant figures gives 259 J.

To Heat 12