Amixing tank receives 3 inlet stream of sugar solution (sugar + water) with varying concentrations and flow rates: stream 1: mass flow rate - 6.1 kg/hr, sugar mass fraction - 0.80 stream 2: mass flow rate - 9.7 kg/hr, sugar mass fraction - 0.09 stream 3: mass flow rate - 3.9 kg/hr, sugar mass fraction - 0.13 the molecular formula of water is h20, sugar is c12h22011 - the atomic weight of the elements are: c-12kg/kmol h-1 kg/kmol 0 - 16 kg/kmol determine the mole fraction of sugar in the resultant mixture. select one: o a. 0.0239 o b. 0.3178 o c. 0.0245 o d. 0.8985 o e. 0.0167

your answer would be a. 12.5 kg

i think it is true since you can test the answer and can use observations to complete it.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol