The complete combustion of ethanol, c2h50h (fw = 46.0 g/mol), proceeds as follows: c2h50h(l) + 3 02(g) → 2 c02(g) + 3 h20(l) llh = -555 kj what is the enthalpy change for combustion of 4.0 moles of c2h50h?

for 1 mol ethanol -555 kj

for 4 moles x => x = -2220kj

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.