Question

mass of food and holder int: 37.9g mass of food and holder final: 35.6g mass off burnt food: 2.3g. mass of beaker 56.3g mass of beaker and water 80.6g mass of water 24.3g water temp int: 30 degrees Celsius water temp final 35 degrees Celsius. change in temp is 5 degrees Celsius. What is the heat energy gained by water ? and what is heat energy per gram? Please show work

Answer 1

Solution :-

Formula to calculate the amount of energy gained by water is as follows

q=m*c*delta T

q= heat , m= mass of water in gram , c= specific heat of water (4.184 J per g C) , delta T = change in temperature

lets calculate the heat gained by water

q= 24.3 g * 4.184 J per g C * 5 C

   = 508.4 J

So heat gained by water is 508.4 J

Now lets calculate the amount of heat energy per gram

Heat energy per gram = amount of heat / mass of food burnt

                                         = 508.4 J / 2.3 g

                                         = 221 J per g

So the het per gram is 221 J/g