Post a New Question

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?

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question