Combustion of Biodiesel Trial 1 Trial 2 Trial 3 DATA Initial mass of biodiesel l

Question

Combustion of Biodiesel Trial 1 Trial 2 Trial 3 DATA Initial mass of biodiesel lamp Final mass of biodiesel lamp Initial temperature of calorimeter Final temperature of calorimeter 21.49 Trial 2 t Same as final mass, Trial 1 Same as final g.6lg 20-22 21.0°c 30.0°C 20 909 20.o13 21.0°C 20.0°C 27.0°C | 30.0°C | CALCULATIONS Change in temperature of calorimeter Energy absorbed by calorimeter (based on Cal calculated above) Change in mass of biodiesel lamp AHcomb of biodiesel in kJ/g Trial 1 Trial 2 Trial 3 10°c 0,35 0.39 grams of biodiesel burned Average AHcomb of biodiesel kJ/g

Explanation / Answer

Energy absorbed by calorimeter can be calculated using formula,

Q=m×c×?t

Q=energy absorbed by calorimeter

m=change in Mass of biodiesel

?t=change in temperature

Assuming heat capacity as C KJ per gram per °C

(It will be given to you in question)

For trial 1-

Q=0.5×6×C =3C KJ

Trial2-

Q=.35×10×C =3.5 C KJ

Trial3-

Q=0.39×9×C =3.51 KJ

As we know

?H=energy absorbed by calorimeter (Q)/change in

Mass(m)

Trial 1-

?H=3C/5 =6C KJ/g

Trial2-

?H=3.5C/0.35=10C KJ/g

Trial3-

?H=3.51C/0.39=9C KJ/g

Average value of ?H = (6C+10C+9C)/3

=25C/3 KJ/g

(Simply put value of C here which will be provided)

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