Recently, biological organisms have been discovered living at great depths at the bottom of the ocean. The properties of common substances are greatly altered there because of enormous hydrostatic pressures caused by the weight of the ocean lying above. The organisms need to equilibrate their internal pressures with this eternal hydrostatic pressure to prevent being crushed.

a.) Estimate the hydrostatic pressure (in bar) in the ocean at depth 2500m. Assume the density of sea water is 1025kg m^-3. The hydrostatic pressure is given by pgh, where p is the density and h is the depth.

b.) Except near sources of heat, such as vents and hot gases coming from Earth's mantle, the temperature is close to 4 degree C. What is the percentage increase in density of liquid water under these conditions compared with that at the surface? The isothermal compressibility K of liquid water at 4 degree C is 4.9458 *10^-10Pa^-1

c.)Consider a balloon filled with oxygen O2 at 1 bar pressure and occupying a 10L volume at 293 K. Assuming ideal gas behavior, what would be its volume at a depth of 2500m under the ocean surface at 277K? What is the percentage increase in density of the O2?

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia. 

Bthats what im doing to and i figured it out it is b