specific heat capacity

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Presentation transcript:

specific heat capacity Hydrogen Bonding in Water Another unique property of water is that it has a very high ______________________. This means that water can _______ and ________ large amounts of _______ as it is heated or cooled. However, these large changes in energy only result in _______ changes in _______________. In other words, water resists changes in temperature. specific heat capacity absorb release energy small temperature

Hydrogen Bonding in Water This is because in before you can make the molecules move _______ the hydrogen bonds between them have to be ___________. Therefore, when you heat water most of the energy actually goes into breaking the hydrogen bonds. Water’s high specific heat helps to stabilize your body’s ______________ and the Earth’s different ____________ within a suitable range for life. faster broken temperature climates

Specific Heat of Water Specific heat is defined as: the amount of energy needed to raise the temperature of 1 g of a substance by 1ºC. Water has a very high specific heat of 4.184

Joules per gram degree celsius Specific Heat Equation q Equation Variable Units = m Cp ΔT x x Thermal energy Specific heat Change in temp. = Mass x x J Joules = °C Degrees Celsius g grams x x Joules per gram degree celsius Ratio of 3 variables

3 Variable Ratio

A Little Chemistry Algebra Let’s practice some algebraic manipulation of variables! Solve q = m  Cp  ΔT… Solve for m Solve for Cp Solve for ΔT

Specific Heat of Water Specific heat is defined as: the amount of energy needed to raise the temperature of 1 g of a substance by 1ºC. Water has a very high specific heat of 4.184

Summary During the summer the ocean is cold and it takes tremendous energy from the sun all winter to heat it up by the end summer time. Then all winter long the ocean water is actually warmer on average than the air temperature! All of that thermal energy is stored by the water, because of hydrogen bonding, taking all winter to cool down again in time for summer when the air starts to get too hot!

Summary Water’s polarity and Hydrogen bonding explains these five unique properties ! High Specific Heat Surface Tension Capillary Action Universal Solvent Density of Ice

Hydrogen Bonds in DNA