You burned a peanut that weights 5.0 grams underneath a calorimeter with 409 mL of water in it. The thermometer reading increased from 21.6 C to 45.5 C. After burning, the peanut weighs 3.43 grams. How many Joules would be released when 1 gram of peanut if burned?

Answer 1

How much heat was released in the experiment?
q = mass H2O x specific heat H2O x (delta T) = ?joules.
What mass of peanut was consumed? That is 5.00g - 3.43 = 1.57g.

So ?joules energy x (1.00/1.57) = xx joules for 1.00 g.

Answer 2

Calculate the heat needed at 0 degrees Celsius in each of the following: joules to melt 65.0g of ice