Campbell Biology Chap 3 Flashcards
Water is formed of ________ bonds
Polar Covalent
When water is in its liquid form Hydrogen bonds are generally
weak, about 1/20 as strong as a covalent bond
at any instant, most of the water molecules are ________ to their neighbors
Hydrogen-Bonded
How does water regulate the air temperature
Water moderates air temperature by absorbing heat from air
that is warmer and releasing stored heat to air that is cooler.
Why is water a good heat bank
Water is effective as a heat bank because it can absorb or
release a relatively large amount of heat with only a slight
change in its own temperature
Anything that moves has ________
Kinetic energy
What is kinetic Energy
the energy an object possesses due to its motion
What is the difference between Thermal Energy and Temperature
temperature represents the average kinetic energy of the molecules in a body of matter, regardless of volume, whereas the thermal energy of a body of matter reflects the total kinetic energy, and thus depends on the matter’s volume
What is heat
Thermal energy in transfer from one body of matter to another
What is a calorie
the amount of heat it takes to raise
the temperature of 1 g of water by 1°C
What is a kilocalorie
is the quantity of heat required to raise the temperature of 1 kilogram (kg) of water by 1°C
What is a Joule
Unit of energy where One joule equals 0.239 cal
What is specific heat
the amount of heat that must be absorbed or lost
for 1 g of that substance to change its temperature by 1°C
What does hydrogen bonding result in in water
Adhesion, Cohesion, high specific heat, Surface Tension, less dense in solid form
What is heat of vaporization
the quantity of heat a liquid must
absorb for 1 g of it to be converted from the liquid to the gaseous state
