Question

A 0.35- g g sample of vegetable oil is placed in a calorimeter. When the sample is burned, 17.9 kJ k J is given off. Part A What is the energy value ( kcal/g k c a l / g ) for the oil?

Answer 1

The energy value of the vegetable oil is 12.8 kcal/g.

Step-by-step explanation:

We can use the following formula to calculate the energy value of the vegetable oil:

Energy value = energy released / mass of sample

We are given that the mass of the sample is 0.35 g and the energy released is 17.9 kJ. We need to convert the energy to calories and the mass to grams to get the answer in kcal/g.

1 kJ = 1000 J

1 cal = 4.184 J

So,

17.9 kJ = 17.9 x 1000 J = 17900 J

17900 J = 17900 / 4.184 cal = 4274.5 cal

Now we can calculate the energy value:

Energy value = 4274.5 cal / 0.35 g = 12212.9 cal/g

Finally, we can convert the answer to kcal/g by dividing by 1000:

Energy value = 12212.9 cal/g / 1000 = 12.8 kcal/g (rounded to one decimal place)