Chapter 3 - C hapte r T h ree: Water and the F i tness of...

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Chapter Three: Water and the Fitness of the Environment Definitions 1) Adhesion: the clinging of one substance to another. 2) Surface tension: is a measure of how difficult it is to stretch or break the surface of a liquid. 3) Kinetic energy: is the energy of motion. 4) The amount of heat: is a measure of the matter’s total kinetic energy due to motion of its molecules. 5) Temperature: is a measure of heat intensity that represents the average kinetic energy of the molecules, regardless of volume. 6) Calorie (cal): is the amount of heat it takes to raise the temperature of 1 g of water by 1°C. 7) Specific heat: the amount of heat that must be absorbed or lost for 1 g of a substance to change its temperature by 1 °C. 8) Heat of vaporization: is the quantity of heat a liquid must absorb for 1 g of it to be converted from the liquid to the gaseous state. 9) An acid: is a substance that increases the hydrogen ion concentration of a solution. 10) A base: is a substance that reduces the hydrogen ion concentration of a solution. 11) pH: is the negative logarithm (base 10) of the hydrogen ion concentration. pH = - log [H + ] 12) Buffers: are substances that minimize changes in the concentrations of H
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This note was uploaded on 09/09/2011 for the course BIO 101 taught by Professor Harounal-rashed during the Spring '11 term at King's College London.

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Chapter 3 - C hapte r T h ree: Water and the F i tness of...

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