Friday
April 18, 2014

Homework Help: chemistry

Posted by chemistry on Wednesday, March 30, 2011 at 12:09am.

A 79.9-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0C,
is burned in excess oxygen, liberating 4.24 10^3 kJ of heat at constant pressure. What
is the identity of the hydrocarbon? (R = 0.0821 L atm/(K mol))
Substance Hf (kJ/mol)
CO2(g) 393.5
H2O(l) 285.8
A) ethane (C2H6, Hf = 84.68 kJ/mol)
B)B) ethylene (C2H4, Hf = 52.47 kJ/mol)
C) propane (C3H8, Hf = 104.7 kJ/mol)
D) acetylene (C2H2, Hf = 226.73 kJ/mol)
E) propylene (C3H6, Hf = 20.41 kJ/mol)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - a 47.7L sample of a gaseous hydrocarbon, measured at 1.00atm and ...
Chemistry - a 9.85 g sample of an unknown metal M is burned in the presence of ...
chemistry - A sample of a saturated hydrocarbon is placed in a 1.0L vessel at ...
Chemistry - A sample of benzene, C6H6, weighing 3.51 g was burned in an excess ...
Chemistry - Consider the following reaction: CH4 +2O2 -> CO2 + 2H2O. Delta H...
chemistry - How many grams of oxygen gas are required to produce 7.46 kJ of ...
chemistry - How many grams of oxygen gas are required to produce 7.46 kJ of ...
Chem - Calculate the work (in kJ) when 1.80 moles of methane react with excess ...
Chemistry - A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess...
Chemistry - 1.00 g of sodium is added to a large excess of water under ...

Search
Members