chemistry

posted by .

Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 -> 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the flask after the reaction is complete, and determine the mole fraction of carbon dioxide. So I must find how many moles of each gas and h2o are formed? Do I add only the gases and use them in pv=nrt? And then substract the vapor pressure of water from the final P?

  • chemistry -

    1. Yes, find the moles of each MATERIAL and i would include water.
    2. Add the moles of the gases together, then add in 23.8 mm Hg for the H2O vapor pressure. From the problem I assume the temperature is to stay at 25 C and we assume no heat is given off in the explosion. If heat is given off then the water will be transformed to a gas and I would add in the moles water vapor, also, and forget about the 23.8.
    3. Use the sum of the moles and PV = nRT to calculate total pressure.

  • chemistry -

    Thank you very much for your time.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. vapor pressure

    The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 450C, the total pressure is 980 mm Hg. The vapor …
  2. Chemistry

    The output of a diesel generator, which contains a mixture of CO2 and H2O gases, is collected in a sealed vessel at 447 K. As the mixture cools to 298 K, the pressure falls from 3.0 atm to 0.80 atm. What is the ratio of CO2 to H2O …
  3. chemistry

    A 0.03 mol sample of NH4NO3(s) is placed in a 1 L evacuated flask, which is then sealed and heated. The NH4NO3(s) decomposes completely according to the balanced equation above. The total pressure in the flask measured at 400 K is …
  4. chem

    Hexane, a component of gasoline, releases more energy per mole when it combusts than does nitroglycerine when it explosively decomposes. Explain why hexane is a better fuel and nitroglycerine is a better explosive. Is it because hexane …
  5. chemistry

    The molar mass of a volatile liquid(one which vaporizes easily) can be determined by a the 'Dumas Method.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with …
  6. AP Chemistry

    The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with …
  7. Chemistry!

    A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask?
  8. Chemistry

    Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 102 g of nitroglycerin.
  9. Chemistry, HELP!!

    a) If the volume of a flask is 165 mL and the mass of the vapor in the flask is 0.2136 grams, what is the density of vapor in the flask?
  10. science

    3 Nitroglycerine is used as an explosive. The equation for the explosion reaction is: 4C3H5(NO3)3 ( l ) 12CO2 ( g) 1 10H2O ( l ) 1 6N2 ( g) 1 O2 ( g) a How many moles does the equation show for: i nitroglycerine?

More Similar Questions