Answer:
No, ΔE does not always equal zero because it refers to the systems internal energy, which is affected by heat and work
Explanation:
According to the first law of thermodynamics, energy is neither created nor destroyed. This implies that the total energy of a system is always a constant.
So, according to the first law of thermodynamics we have that ΔE = q + w. This means that the value of ΔE depends on q (heat) and w(work). Hence ΔE is not always zero since it depends on the respective values of q and w.
You need to find number of moles of methane and oxygen. then make ratios
True is the answer as at 100 Celsius water boils
(0.878)(267.8) + (0.122)(269.9)=
268 u (three sig fig)
Check my calculations
