To calculate the heat required to raise the temperature of a substance, we can use the formula:q = mcTwhere q is the heat required, m is the mass of the substance, c is the specific heat capacity, and T is the change in temperature.In this case, we have:m = 75 g mass of water c = 4.18 J/gC specific heat capacity of water T = 90C - 25C = 65C change in temperature Now, we can plug these values into the formula:q = 75 g 4.18 J/gC 65C q = 20392.5 JSo, the heat required to raise the temperature of 75 g of water from 25C to 90C is 20,392.5 Joules.