To calculate the heat capacity of water, we can use the formula:q = mcTwhere:q = heat capacity Joules m = mass of water grams c = specific heat capacity of water 4.18 J/gC T = change in temperature C Given:m = 50 gT = 65C - 25C = 40Cc = 4.18 J/gCNow, we can plug these values into the formula:q = 50 g 4.18 J/gC 40C q = 50 4.18 40q = 8376 JoulesThe heat capacity of 50g of water when its temperature is raised from 25C to 65C is 8376 Joules.