The human body obtains 885 kJ of energy from a chocolate chip cookie.

If this energy were used to vaporize at 100 degree Celsius, how many grams of water could be vaporized? The heat of vaporization of water at 100 degrees Celsius is 40.7 kJ/mole.

To find out how many grams of water can be vaporized using 885 kJ of energy, we need to use the heat of vaporization of water at 100 degrees Celsius.

First, we need to convert the heat of vaporization from kJ/mole to kJ/g. To do this, we need to know the molar mass of water, which is approximately 18 g/mol.

So, the heat of vaporization (40.7 kJ/mole) can be converted to kJ/g by dividing by the molar mass of water (18 g/mol).

40.7 kJ/mole ÷ 18 g/mol = 2.261 kJ/g (rounded to three decimal places)

Now, we can find out how many grams of water can be vaporized by dividing the total energy available (885 kJ) by the heat of vaporization per gram (2.261 kJ/g).

885 kJ ÷ 2.261 kJ/g ≈ 390.89 g (rounded to two decimal places)

Therefore, approximately 390.89 grams of water could be vaporized using 885 kJ of energy.

DrBob222 did it last night. See the related questions below.