The problem can be solve using the formula: q = m Cp T where q is the heat added to the substance m is the mass of the substance Cp is the specific of the substance T is the change in temperature of the subtance
q = m Cp T 515 = m ( 4.18 ) ( 20) m = 515 / ( 4.18) ( 20 ) m = 6.16 g of water
