OCEANOGRAPHY EXAM 2 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) Why is the water molecule a 'polar' molecule? - Correct Answers ✅It has oppositely charged poles Unusual bend in geometry causes polarity two hydrogen atoms hang on one side of atom where you have a weaker hold on electrons What is a hydrogen bond, how does it form, why is it important? - Correct Answers ✅Forms between 2 water molecules, adding up to make H2O model Accounts for many of water's significant properties even though it is only 5% as strong as bonds btwn H and O, like high surface tension Describe the unique properties of water (cohesion, high surface tension, high dissolving power, high heat capacity, high melting and boiling points, high heat of fusion and vaporization, density of solid less than density of liquid) -
Correct Answers ✅cohesion: hydrogen bonds hold water
molecules together
high surface tension: water is adhesive and elastic, tends to
aggregate in drops rather than spread out over surface 1 / 4
OCEANOGRAPHY EXAM 2 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025)
high dissolving power: water dissolves table salt by attracting
oppositely charged particles; water pulls particles out of NACI to dissolve it
high heat capacity: heat capacity of pure water is 1 calorie,
higher than most other substances; due to hydrogen bonds btwn water molecules which absorb significant amt of energy
high melting and boiling point: latent (hidden) heat=energy
that is absorbed or released as water changes state; if it wasn't for H bonds/bipolar nature of water molecule we would not have ice or liquid water
high heat of fusion and vaporization: Need a lot to make the
change in state -Melting ice=80cal/g, boiling = 540 cal/g -Latent heat -When I melt ice/freeze water; boil water/condense water that process is blind in terms of temperature Exchange of energies only goes into change of state -Melt of ice sucks away energy from your drink Difference between evaporation and boiling -One by one molecule process vs. all of them boiling -Energy required to transform states depends on temperature (Lower the temperature, the more you need) 2 / 4
OCEANOGRAPHY EXAM 2 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) --> Sweat, we lose heat Sweat will evaporate Density of solid is less than liquid What is the difference between temperature and heat? -
Correct Answers ✅Temperature: measure of how fast the
molecules in a substance are moving
Heat: measure of how much energy has to be put into (or
gotten out of) a substance to change its temperature, or state (solid, liquid, gas) Describe the arrangement of water molecules as they exist in the gaseous, liquid, and solid states. - Correct Answers
✅solid: tightly packed together
liquid: less packed together
gas: very loosely packed together
Define heat capacity and latent heat.** REVIEW - Correct Answers ✅Heat capacity: how much heat water can absorb 3 / 4
OCEANOGRAPHY EXAM 2 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) or release before changing temperature/amount of energy needed to be added to water to increase temp of water 1 degree celsius
Latent heat: hidden heat. energy that is absorbed or released
when water changes state How can evaporation occur at temperatures less than 100°C?
- Correct Answers ✅some water particles have greater
energy and are able to evaporate before 100 degrees What is the difference between sensible and latent heat? -
Correct Answers ✅sensible heat: what we sense from
different temperatures (warm, hot, cool, etc.)
latent heat: energy needed to change state (ice to water,
water to vapor) Calculate the total amount of heat required to convert 5 gr of ice at -15°C to 5 gr of water vapor at 106°C. EXAM QUESTION!! - Correct Answers ✅1) ice -15C to 0C 5gr x .5gr/cal/c x 15C = 2) ice to water 5gr x 80cal/gr =
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