The enthalpy of combustion of ethane gas, c2h6(g), is about -1.5*103 kj/mol. when ethane reacts with o2(g), the products are carbon dioxide co2(g) and water h2o(l). how much heat is released during the combustion of ethane gas when 14 mols of o2(g) are consumed. express your answer in kj.

6.0×10^3 KJmol-1

Explanation:

Equation of the reaction

C2H6(g) + 7/2 O2(g) > 2CO2(g) + 3H2O(g)

From the balanced reaction equation:

1 mole of ethane reacts with 3.5 moles of oxygen

x moles of ethane will react with 14 moles of oxygen

x= 14/3.5 = 4 moles of ethane

If heat of combustion of ethane= -1.5*103 kJ/mol

Then for 4 moles of ethane= 4× -1.5*103 kJ/mol= 6.0×10^3 KJmol-1

a:

by the combination of an unlimited number of elements

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.