# Chem

posted by .

The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy
consumption?
1. 5.01 × 107 kJ
2. 8.45 × 102 kJ
3. 34 × 107 kJ
4. 7.80 × 103 kJ
5. −13 × 103 kJ

• Chem -

See your later post.

• Chem -

express 47.2 in scientific notation?

## Similar Questions

1. ### AP Chem

The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy consumption?
2. ### 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?
3. ### Science: Chemistry - Enthalpy

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?
4. ### chem

The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows. 2 C8H18(l) + 25 O2(g) ¨ 16 CO2(g) + 18 H2O(g) Octane has a density of 0.692 g/mL at 20‹C. How many grams of O2 are required to burn …
5. ### chemistry

A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.12°C to 29.85°C. What is the heat of combustion per …
6. ### chemistry

according to the American insurance companies, a driver will travel 12,000 miles in a single year. gasoline may be taken as primarily c8h18. the drives vehicle gets 25.0 miles per gallon. the density of octane is 0.703 g/ml. how much …
7. ### Chemistry

In a bomb calorimeter, a 6.50 g sample of octane (C8H18) is combusted. The combustion enthalpy for octane is -5.45 MJ per mol C8H18. The temperature change of the calorimeter is 16.5 oC. What is the heat capacity of the calorimeter?
8. ### 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?
9. ### chemistry

According to the American Insurance Companies, on average, a vehicle is driven 12,000 miles per year. In the chemical equation below, gasoline is given as octane, or C8H18. Assume the vehicle gets 22.0 miles per gallon. The density …
10. ### Science - Chemistry

Calculate the amount of energy a woman takes in during a year on a 2200kcal a day diet (1 calorie = 4.18J). Calculate the amount of energy she spends in driving 5000 miles a year at 40 miles to the gallon of octane, given 1 gallon …

More Similar Questions