contestada

When 0.670g sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370g of water from 22.7 °C to 39.1 °C, what is the energy value of the olive oil in kcal/g?

Respuesta :

Chlidonias

Mass of olive oil burned = 0.670 g

Mass of water = 370 g

Temperature change of water = [tex]39.1^{0}C-22.7^{0}C=16.4^{0}C[/tex]

Heat absorbed by water = Heat liberated by burning of olive oil

Calculating the heat absorbed by water:

[tex]q = mC(deltaT)[/tex]

q = [tex](370g)(4.184\frac{J}{g^{0}C } (16.4^{0}C) =25388.5 J[/tex]

Heat released by burning of olive oil = 25388.5 J

Energy value of olive oil= [tex]\frac{25388.5 J}{0.670g} *\frac{1kcal}{4184J}=9.06kcal/g[/tex]