Consider the combustion of methane in oxygen (a reaction we've seen when we've lit soap bubbles on fire), which is a highly exothermic reaction. true or false - once the activation energy has been reached, increasing the temperature will have no effect on the rate of the reaction. true or false - a mixture of methane and oxygen can be kept in the same container indefinitely at room temperature with no change because there are no collisions taking place between the molecules. true or false - once the activation energy has been reached increasing the concentration of methane and oxygen will increase the rate of the reaction. true or false - a successful collision (one that leads to the combustion of methane) will have sufficient energy and any orientation between molecules.