Use the tabulated values of ?G?f in Appendix IIB in the textbook to calculate E?cell for a fuel cell that employs the reaction between methane gas (CH4) and oxygen to form carbon dioxide and water. Express your answer using four significant figures.

it can be icreased by increasing pressure.

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.