The equation shows one mole of ethanol fuel being burned in oxygen. Convert the energy released into its equivalent mass.
C2H5OH(l) + 3 O2(g) Æ 2 CO2(g) + 3 H2O (l) ΔH = -1418 kJ/mol

Question

The equation shows one mole of ethanol fuel being burned in oxygen. Convert the energy released into its equivalent mass.
C2H5OH(l) + 3 O2(g) Æ 2 CO2(g) + 3 H2O (l) ΔH = -1418 kJ/mol

anonymous · Answer

E=mc^2

anonymous · Answer

i still dont undererstand it though...can you do it step by step?

.sam. · Answer

E=energy
m=mass
c=speed of light

callisto · Answer

For burning one mole of ethanol, energy released = 1418 kJ
By Einstein's mass - energy relationship
E=mc^2
1418x10^3 = m (3x10^8)^2
m= (1418x10^3) / (3x10^8)^2=?
I hope I'm not incorrect... I haven't done anything like that for a month :(

anonymous · Answer

E= ΔH = -1418 kJ/mol