To calculate the amount of heat absorbed by the water, we can use the formula:q = mcTwhere q is the heat absorbed, m is the mass of the water, c is the specific heat of water, and T is the change in temperature.Given:m = 50 gc = 4.18 J/gKInitial temperature T1 = 20CFinal temperature T2 = 100CFirst, we need to find the change in temperature T :T = T2 - T1T = 100C - 20CT = 80CNow, we can plug the values into the formula:q = 50 g 4.18 J/gK 80 K q = 50 4.18 80q = 16720 JSo, the amount of heat absorbed by the 50 g sample of water when heated from 20C to 100C is 16,720 Joules.