Thermochemistry please

posted by .

I really need help on this problem...
=====================
Hydrocarbon Formula Delta H (kj/mol)
1,3-Butadiene C4H6(g) 111.9

a) calculate the fuel value in kJ/g for this compound and determine the percentage of hydrogen by mass.


I've tried it for hours yet I can't figure out how to do this.

Please help thank you@!!

You have kJoules/mol. How many grams of this compound are in one mole? Divide your given number by the grams in a mole to get kJ/g.

Percentage of H?

6(atomic mass H)/molmassC4H6 * 100

Here is the problem-
Calculate the total enery change when warming 5.00g of ice at -15 degrees celcius to liquid water at 25 degrees celcius.

could i get a step by step solution and answer to this problem??? What is the thermal energy change as 175.og of water drops from 75.00 degrees celcius to 15.50 degrees celcius? help?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Need some help. have the A part of the question but do not know how to set B or C. Butadiene (C4H6) reacts with itself to form a dimer with the formula C8H12. The reaction is second order in butadiene. If the rate constant at a particular …
  2. Chemistry

    Hydrogen and methanol (CH3OH) have both been proposed as alternatives to hydrocarbon fuels. a) Write balanced chemical equations for the complete combustion of hydrogen and the complete combustion of gaseous methanol. Combustion reaction …
  3. Chemistry

    0.717 g of a compound containing carbon, hydrogen, and oxygen is burned and found to produce 1.02 g CO2 and 0.624 g H2O. The molar mass of the compound is 124 g/mol. (a) Write a chemical equation for the combustion of this unknown …
  4. Chemistry

    0.717 g of a compound containing carbon, hydrogen, and oxygen is burned and found to produce 1.02 g CO2 and 0.624 g H2O. The molar mass of the compound is 124 g/mol. (a) Write a chemical equation for the combustion of this unknown …
  5. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent …
  6. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent …
  7. Finding the Molecular Formula

    A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound?
  8. Chemistry

    A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound?
  9. chemistry

    1- A compound is 87.5% nitrogen and 12.5% hydrogen. The molecular weight of the compound is 32 g/mol. Describe the molecule referencing shape, and inter-molecular forces. 2- Gaseous butadiene, C4H6 , reacts with hydrogen gas in the …
  10. chemistry

    How many formula units are in 1.31 mg of hydrogen peroxide (H2O2)?

More Similar Questions