The standard enthalpies of formation of gaseous propyne (C3H4), propylene (C3H6), and propane (C3H8) are +185.4, +20.4, and -103.8 kJ/mol, respectively.

asked by @madisonf34 • about 1 year ago • Chemistry • 5 pts

Calculate the heat evolved per mole on combustion of each substance to yield CO2(g) and H2O(g).

Add comment
2 answers

Hey there! So you can get the enthalpy of combustion from the given enthalpy of formation Using this formula:

enter image description here

Assitional standard enthalpies of formation:

CO2 = -393.5 kJ/mol

H2O = -241.8 kJ/mol

O2 = 0 kJ/mol

I'll do the propyne (C3H4) step by step, the other will just be similar. Just get the balanced chemical reaction for each gas.

I hope this helps!

answered by @leot1 • about 1 year ago

THANK YOU SO MUCH

answered by @madisonf34 • about 1 year ago