A 0.0500-mol sample of a nutrient substance is burned in a bomb calorimeter cont

Question

A 0.0500-mol sample of a nutrient substance is burned in a bomb calorimeter containing 2.00 X 10^2 g H2O. if the formula weight of this nutrient sunstanc is 114 g/mil, what is the fuel value (in nutritional cal) if the temperature of the water increased 5.70 C A 0.0500-mol sample of a nutrient substance is burned in a bomb calorimeter containing 2.00 X 10^2 g H2O. if the formula weight of this nutrient sunstanc is 114 g/mil, what is the fuel value (in nutritional cal) if the temperature of the water increased 5.70 C A 0.0500-mol sample of a nutrient substance is burned in a bomb calorimeter containing 2.00 X 10^2 g H2O. if the formula weight of this nutrient sunstanc is 114 g/mil, what is the fuel value (in nutritional cal) if the temperature of the water increased 5.70 C

Explanation / Answer

No. of moles of nutrient = 0.05mol

therefor weight of the nutrient is = molecular weight x no. of moles ;

i.e; 114g/mol x 0.05mol = 5.7g of nutrient.

Temperature change T = 5.7°C;

Q = mcT

Water gains is 200g x 1.0cal/g/°C x 5.7°C = 1,140cal/1000cal/Cal = 1.14 food Calories.

1.14Cal / 5.7g = 0.2 Cal/g food value.

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