To calculate the heat capacity of 50 grams of water, we can use the formula:Heat capacity = mass specific heat capacitywhere mass is the mass of water 50 grams and specific heat capacity is the specific heat capacity of water 4.18 J/gC .Heat capacity = 50 g 4.18 J/gC = 209 J/CSo, the heat capacity of 50 grams of water at 25C is 209 J/C.