# chemistry

posted by .

couple theory questions i don't quite understand...

What is vapor pressure ad why does it change with temperature?

and...

The assumption was made that slight changes in the depth under the surface of the water will not significantly change total pressure in a graduated cylinder. Comment on the validity of this assumption.

any help is appreciated. :-)

• chemistry -

For vapor pressure see this site.

http://en.wikipedia.org/wiki/Vapor_pressure

Under some conditions the last statement problem is true and it may not be true under other conditions. The context of the question is very important.

## Similar Questions

1. ### AP Chemistry

These are some lab questions from the following lab: Vapor Pressure and Enthalpy of Vaporization of Water 1. Why does vapor pressure change with temperature?
2. ### last physics problem.

At 25.0 m below the surface of the sea(density=1025 kg/m^3) where the temperature is 5.00 C, a diver exhales an air bubble having a volume of 1.00 cm^3. If the surface temperature of the sea is 20.0 C, what is the volume of the bubble …

If deep-sea divers rise to the surface too quickly, nitrogen bubbles in their blood can expand and prove fatal. This phenomenon is known as the bends. If a scuba diver rises quickly from a depth of 25.0 m in Lake Michigan (which is …
4. ### physic

you are designing a diving bell to withstand the pressure of sea water at a depth of 250m. a)what is the quage pressure at the depth(you can ignor the small changes in the density of the water with depth.) b)at the 250m depth, what …
5. ### Chemistry

The vapor pressure of water at 25°C is 23.76 mm Hg. What would you calculate as the new vapor pressure of a solution made by adding 50.5 g of ethylene glycol (HOCH2CH2OH, antifreeze) to 50.5 g of water?
6. ### chemistry

The Clapeyron-Clausisus Equation is ln(P2/P1) = dHvap/R [(1/T1)-(1/T2)]. Assuming that dHvap doesn't change with the temperature, this equation relates the change in vapor pressure and temperature to a substances enthalpy of vaporization …
7. ### chemistry

A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth of 35m, where the pressure is 4.5atm and the temperature is 18degrees C.what is the final volume at this …