This video outlines the procedures for calculating the activation energy of a reaction using Excel. By determining the slope of the best fit line for natural log (ln) of the rate constant (k) versus reciprocal temperature (1/T), the activation energy can be determined.
Flour is the most common mis-measured ingredient. When measuring flour, use the âspoon & levelâ method. Do not scoop the flour out of the container/bag with your measuring cup. Believe me, I catch myself doing it often! Scoop the flour and you could end up with 150% of the correct measurement. Rather, using a spoon, scoop the flour into the measuring cup. Do not pack the flour down and do not tap the measuring cupâ both cause the flour to settle in the cup. After youâve spooned the flour into the measuring cup, use the back of a knife to level off the top of the measuring cup.
A level tablespoon is just that, level. For example, if a recipe calls for a level tablespoon of flour, you dip the measuring spoon into the flour, then 'level it off' with a knife, so that the flour goes to the top of the measuring spoon, but not above. For a heaping tablespoon, dip the measuring spoon into the flour, but don't level it off. Leave it heaping full, with the flour piled high. But, whether the recipe calls for a tablespoon, teaspoon, etc.. always use a standard measuring spoon, not one used for eating.