Native Canadians used to boil water from maple tree sap by heating rocks and placing them into vats of sap sitting in hollowed-out tree logs. For this problem, assume that the syrup and the rocks have the heat capacities of water and sand respectively. What mass of stone, heated to 1000 °C, would be needed to increase 20.0 kg of sap from 60.0 °C to 85.0 °C? (Assume both the sap and stone come to the same final temperature)

Native Canadians used to boil water from maple tree sap by heating rocks and placing them into vats of sap sitting in hollowed-out tree logs. For this problem, assume that the syrup and the rocks have the heat capacities of water and sand respectively. What mass of stone, heated to 1000 °C, would be needed to increase 20.0 kg of sap from 60.0 °C to 85.0 °C? (Assume both the sap and stone come to the same final temperature)