uestion 7 of 7 (1 point) x I White gas is a mixture of Cs compounds and Ce compo

Question

uestion 7 of 7 (1 point) x I White gas is a mixture of Cs compounds and Ce compounds. The heavier hydrocarbons in white gas are hexanes (CBH). a. Calculate the fuel value of C6H14. given that dH comb =-4163 kJ/mol. 48.31 kJ/g b. How much heat is released during the combustion of 3.75 kg of CoH4? Number 1.8 x 10 k.J C. How many grams of C6Hu are needed to heat 2.25 kg of water from 16.0 to 62.5"C? Assume that all of the heat released during combustion is used to heat the water 9.05 0 Hint Check Answer

Explanation / Answer

From the given data

fuel value for C5 = 48.99 kJ/g

fuel value for C6 = 48.31 kJ/g

Total fuel value for white gas = 0.25 x 48.99 + 0.75 x 48.31 = 48.48 kJ/g

Total heat released to heat 2.25 kg water from 16 to 62.5 oC = -437.751 kJ

So,

amount of white needed = 437.751/48.48 = 9.029 g

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