1) When part of a liquid evaporates, it cools down because only the fastest molecules are leaving. we have no idea what just happened. it warms up so evaporation can take place. it usually changes color. the temperature always remains the same.
1) When part of a liquid evaporates, it cools down because only the fastest molecules are leaving. we have no idea what just happened. it warms up so evaporation can take place. it usually changes color. the temperature always remains the same.
Chapter10: Energy
Section: Chapter Questions
Problem 65A
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1) When part of a liquid evaporates,
it cools down because only the fastest molecules are leaving.
we have no idea what just happened.
it warms up so evaporation can take place.
it usually changes color.
the temperature always remains the same.
2) In thermodynamics , the volume of a gas, its temperature, work being done on it or by it, and heat all can change. If there is no exchange of heat, we also call this process:
isovolumetric
isotone
adiabatic
isobaric
isothermal
3) Usually, air masses at high altitude are colder than those close to the ground, because the ground is heated by the Sun, and all air radiates away energy at night. Sometimes warm air with low density moves over a cold ground layer; or cold, dense air at night flows down mountain slopes, while the mountain tops receive full sunlight during the day. In each case, the air pressure decreases from ground level to high altitude – but density and temperature profiles change. If the temperature is higher at high altitude, this is also called:
an inversion
relative humidity
non-conservation of energythe rain shadow effect
virga
4) Physical systems work in a “one-way street” – the amount of information we have about the state (energy state, position, velocity, etc.) of the molecules, atoms, and particles involved in general, decreases over time. A measure of the decrease of this type of information over time, or the increase in disorder, is called:
energy
force
the adiabatic constant
entropy
work
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