a humane being requires 2700kcal of energy per day,if the ethalpy of composition of glucose is -1350kcal/mol,how many grams of glucose a person has to consume every day?
2700kcal*(1mole of glucose/1350kcal)*(180.156 g/mol)=??????
360.312J
To find the number of grams of glucose a person needs to consume every day, we need to use some conversions and calculations based on the given information.
First, we need to convert the energy requirement from kilocalories (kcal) to calories (cal). 1 kcal is equal to 1000 cal.
2700 kcal/day * 1000 cal/kcal = 2,700,000 cal/day
Next, we need to find the number of moles of glucose needed to provide this amount of energy. We can use the given enthalpy of combustion, which is -1350 kcal/mol. This means that 1 mole of glucose releases 1350 kcal of energy when completely oxidized.
2,700,000 cal/day / 1350 cal/mol = 2000 mol/day
Now, we need to convert moles to grams. The molar mass of glucose (C6H12O6) is approximately 180 g/mol.
2000 mol/day * 180 g/mol = 360,000 g/day
Therefore, a person would need to consume approximately 360,000 grams (or 360 kg) of glucose every day to meet their energy requirement of 2700 kcal.