Which law forbids the attainment of the temperature of absolute zero?

The second law of thermodynamics tells us that heat doesn't flow from (a) hot to cold ever. (b) cold to hot ever. (c) hot to cold without external energy. (d) cold to hot without external energy.

With respect to orderly and disorderly states, what do natural systems tend to do? Can a disorderly state ever transform into an orderly state? Explain.

When you breathe on your hand, the temperature of the exhaled air reaching your hand (a) increases. (c) remains unchanged. (b) decreases. (d) depends on how you blow.

The lowest possible temperature is absolute zero, at (a) 0 kelvin, (c) Both are the same. (b) $-273^{\circ} \mathrm{C}$. (d) None of these.

What happens to the quality of energy with each transformation? What does the word 'quality' imply?

When water changes to steam, energy is (a) absorbed by the water. (b) released by the water. (c) conserved as the phase change occurs. (d) changed to a different form.

Distinguish between high-quality energy and low-quality energy in terms of organized and disorganized energy. Give an example of each.

Regelation occurs due to water's (a) high specific heat. (b) open-structured ice crystals. (c) high rate of expansion. (d) slight tendency to freeze when its temperature is lowered.

Why is the condensation part of the cycle in a steam turbine so essential?

Boiling and freezing occur when water is subjected to (a) decreased temperatures. (b) decreased atmospheric pressure. (c) increased temperatures. (d) increased atmospheric pressure.

How does the second law relate to heat engines?

The process of boiling water tends to (a) warm the water. (c) Both. (b) cool the water (d) Neither.

What exactly is thermal pollution?