answer these question choosing a b c or d

What is the cause of the strange thermal properties of water?

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I add 3000 Joules to 1 kg of a liquid and it warms up by 6 oC. What is the specific heat of the liquid?

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Which of the following water properties is responsible for causing the sea breezes that keep Irvine cooler during the hot summer months?

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How does the latent heat of vaporization of water help us regulate our body temperatures when we sweat?

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The two graphs below show the density of freshwater (on the left) and the density of seawater (on the right) vs temperature. Use the graphs to help you select the TRUE statement below.

fresh salt water density.jpg

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UNLIKE FRESHWATER WHICH IS MOST DENSE AT 4 OC, THE DENSITY OF SEAWATER CONTINUES TO INCREASE UNTIL IT REACHES ITS FREEZING POINT.

Seawater is less dense than freshwater at all temperatures.

Freshwater density is more sensitive to changes in temperature than seawater density (i.e. freshwater density changes more dramatically as temperature increases).

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The salinity in the Dead Sea is 342 ‰ – it is so high that nothing but bacteria can live in it. What mass of salt would remain if I evaporate 2kg of seawater from there?

dead sea picture.jpg

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Ocean salinity is made up of 6 major elements but many other “trace elements”. Examine the table to work out which of the elements listed below has the lowest concentration in seawater.

trace element table.jpg

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What causes salinity to be higher in the tropics than at the pole?

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Which of the following would increase salinity by increasing the amount of dissolved material in the ocean?

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We will discuss desalination as a source of freshwater in more detail next week. Do some quick research online to work out which of the following statements about desalination is FALSE?

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