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 heat capacity, and T is the change in temperature.In this case, we have:m = 50 g mass of water c = 4.184 J/gC heat capacity of water T = 50C - 20C = 30C change in temperature Now, we can plug these values into the formula:q = 50 g 4.184 J/gC 30C q = 6276 JSo, the heat required to raise the temperature of 50 grams of water from 20C to 50C is 6276 Joules.