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?
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.
Calculate the heat needed at 0 degrees Celsius in each of the following: joules to melt 65.0g of ice
To calculate the energy released when burning 1 gram of peanut, we can use the concept of specific heat capacity and the temperature change caused by burning the peanut.
First, let's calculate the amount of heat gained by the water in the calorimeter:
Heat gained by water = mass of water × specific heat capacity of water × change in temperature
The given mass of water is 409 mL, and 1 mL of water is equivalent to 1 gram (since the density of water is approximately 1 g/mL). Thus, the mass of water is also 409 grams.
The specific heat capacity of water is approximately 4.18 J/g·°C.
Change in temperature = final temperature - initial temperature = 45.5°C - 21.6°C = 23.9°C.
Substituting these values into the equation:
Heat gained by water = 409 g × 4.18 J/g·°C × 23.9°C = 21,020.14 J.
Next, let's calculate the energy released by the peanut:
Energy released by the peanut = initial mass of the peanut - final mass of the peanut × heat of combustion of the peanut.
The initial mass of the peanut is 5.0 grams, and the final mass of the peanut is 3.43 grams.
To find the heat of combustion, we need information about the heat produced when burning 1 gram of peanut. Unfortunately, that information is not provided in the question.
In order to proceed with the calculation, we would need to know the heat of combustion of the peanut, which represents the energy released per gram of the peanut when it is burned.
Without the heat of combustion of the peanut, we cannot determine the exact energy released when 1 gram of peanut is burned.