# Chemistry

What mass of octane must be burned in order to liberate 5410 kJ of heat?

1. 👍 0
2. 👎 0
3. 👁 596
1. Do you have the heat of combustion? If not you can calculate it this way.
2C8H18 + 25O2 ==> 16CO2 + 18H2O

dHrxn = dH combustion = (n*dHo formation products) - n*dHo reactants).
So you will obtain that many kJ for 228 g octane. Convert that to grams needed for 5410 kJ.
Post your work if you get stuck.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### More Chem

Consider the combustion of propane. Delta H is -2221 kJ. Assume all heat is from combustion of propane. What mass of propane must be burned in order to furnish this amount of energy assuming the heat transfer process is 60%

2. ### chemistry

During the combustion of 5.00g of octane C8H18, 239.5 kcal is released. Write a balanced equation for the combustion reaction. Are reactants or products favored? What is the sign of change of heat for this reaction? how much

3. ### Chemistry

If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane are burned. the molar mass of octane is 114 g/mol

4. ### Chemistry

The enthalpy change in the combustion of the hydrocarbon octane is delta H = -5.48 x 10^3 kJ/mol C8H18 (l). How much heat, in kilojoules, is liberated per gallon of octane burned? (Density of octane = 0.703 g/mL; 1 gal = 3.785 L.)

1. ### chemistry

An alternative approach to bomb calorimetry is toestablish the heat capacity of the calorimeter, exclusive of the water it contains. The heat absorbed by the water and by the rest of the calorimeter must be calculated separately

2. ### chemistry

How much heat will be released if 30 g of octane is burned in excess of oxygen? C8 H18 + 12.5 O2 yields 8CO2 + 9H2O Delta H= -5483.4 kJ

3. ### Chemistry

What mass of octane must be burned in order to liberate 5510 kJ of heat? ΔHcomb = -5471 kJ/mol.

4. ### chemistry

A major component of gasoline is octane (C8H18). When octane is burned in air it chemically reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of oxygen gas is consumed by the reaction of 8.17g of

1. ### Chemistry

Compounds like CCL2F2 are known as chloroflourocarbons, or CFCs. These compounds were once widely used as refrigerants but are now being replaced by compounds that are believed to be less harmful to the environment. The heat of

2. ### chemistry

When a 3.10g sample of liquid octane (C8H18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 26.8∘C. The heat capacity of the calorimeter, measured in a separate experiment, is 6.30kJ/∘C .

3. ### Chemistry

The combustion of benzoic acid releases 26.38kJ/g and is often used to calibrate a bomb calorimeter. the combustion of 1.045 g of benzoic acid caused the temperature of the calorimeter to rise by 5.985C. Useing the same

4. ### Chemistry

During the combustion of 5.00 g of octane, C8H18, 239.5 kcal (1002 kJ) is released. How many moles of octane must be burned to release 451.4 kcal ?