If 5g of butter are burned in a calorimeter containing 1 L of water (density of water is 1g/mL), the temperature of the water rises from 21°C to 66°C. determine the amount of energy that is transferred to the water.
2007-11-07 23:00:07 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
1 L of water = 1000 g of water
Heat transferred to water
= m s ΔT
= 1000 * 1 * (66 - 21) cal
= 45000 cal.
2007-11-07 23:03:58 · answer #1 · answered by Madhukar 7 · 0⤊ 0⤋
The amount of energy required to heat up anything is given by the formula
Heat energy equals mass of substance (in this case, 1000 g water) x increase in temperature x [very important] specific heat of substance.
Units have to match. If you want your answer in J, then the specific heat of water that you need is 4.184 J/g/degree. If you want your answer inwho calories the specific heat is just 1.00 cal/g/degree.
2007-11-07 23:12:40 · answer #2 · answered by Facts Matter 7 · 2⤊ 0⤋