Consider the reaction between 60.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 28.0 L of O2 at 27.0°C and a pressure of 1.51 atm?
I am unsure of where to start with this problem...
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I don't see a question here.
sorry, I get distracted easily:
Consider the reaction between 60.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 28.0 L of O2 at 27.0°C and a pressure of 1.51 atm. The products of the reaction are CO2(g) and H2O(g).
Calculate the number of moles of H2O formed if the reaction goes to completion.
Consider the reaction between 60.0 mL of liquid ethanol (C2H5OH; density = 0.789 g/mL) and 28.0 L of O2 at 27.0°C and a pressure of 1.51 atm. The products of the reaction are CO2(g) and H2O(g).
Calculate the number of moles of H2O formed if the reaction goes to completion.
You have a number of problems here all rolled into one giant problem. First it is a limiting reagent (LR) problem.
Convert ethanol to grams using the density. mass = volume x density.
Then convert g ethanol to mols. mols = grams/molar mass
Convert O2 to mols using PV = nRT and remember T must be in kelvin.
Using the coefficients in the balanced equation, convert mols ethanol to mols H2O.
Do the same for mols O2 to mols H2O.
It is likely that the two values for mol H2O will not agree which means one of them is wrong. The correct value in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent.
Convert ethanol to grams using the density. mass = volume x density.
Then convert g ethanol to mols. mols = grams/molar mass
Convert O2 to mols using PV = nRT and remember T must be in kelvin.
Using the coefficients in the balanced equation, convert mols ethanol to mols H2O.
Do the same for mols O2 to mols H2O.
It is likely that the two values for mol H2O will not agree which means one of them is wrong. The correct value in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent.
Ok so I was making it harder than I thought and should have followed my instinct when my brain kept saying limiting reactant.
Im gonna get it done then, last problem on homework.
Thank You Dr. Bob
Im gonna get it done then, last problem on homework.
Thank You Dr. Bob
4 answers