A. Read each item carefully and choose the letter of the correct answer. 1. Which of the following statements best describes the Second Law of Thermodynamics? A. The internal energy of the universe is constant. B. Energy can neither be created nor destroyed. C. At absolute zero, the entropy of a crystal is considered to be zero. D. When an isolated system undergoes a spontaneous change, the entropy of the system increases. 2. Which of the following represents a spontaneous process? A. ∆S<0 B. ∆S=0 C. ∆G>0 D. ∆G<0 3. Which of the following has the most entropy? A. an empty classroom B. a tennis ball inside a box C. a flock of birds flying in V formation D. a crowd of people on the streets of Santa Rosa City B. Predict whether ∆S is positive or negative for the reaction: N2(g) + O2(g) → 2NO(g) C. Which has greater entropy? 1mole of NaCl(5) or 1 mol of HCl(g)
Latent heat and phase change
A physical process in which a conversion among the basic states or phases of matter, i.e., solid, liquid, and gas takes place under the effect of a certain temperature and pressure is referred to as a phase change. Generally, the phase change of a substance occurs when heat transfer takes place between the substance and its surroundings. Based on the direction in which heat transfer takes place, different types of phase changes can occur.
Triple Point of Water
The branch of physics in which observer deals with temperature related properties is called thermodynamics.
Boiling Point of Water
Everyday examples of boiling is, boiling milk, heating water. One would have observed that when we heat water it goes through various stages and at one point bubbles show in water, and water keeps splashing with bubbles bursting, we in layman terms say that water is boiling.
Freezing Point of Water
In general, the freezing point of water is 0° Celsius, or 32° Fahrenheit. This is the temperature at which water will ordinarily change from its liquid state to its solid state (ice). However, there are certain conditions that can affect the freezing point of water. For example, a liquid may be supercooled or contain impurities so that it does not freeze at the ordinary freezing point.
A. Read each item carefully and choose the letter of the correct answer.
1. Which of the following statements best describes the Second Law of
A. The internal energy of the universe is constant.
B. Energy can neither be created nor destroyed.
C. At absolute zero, the entropy of a crystal is considered to be zero.
D. When an isolated system undergoes a spontaneous change, the entropy of the system increases.
2. Which of the following represents a spontaneous process?
A. ∆S<0
B. ∆S=0
C. ∆G>0
D. ∆G<0
3. Which of the following has the most entropy?
A. an empty classroom
B. a tennis ball inside a box
C. a flock of birds flying in V formation
D. a crowd of people on the streets of Santa Rosa City
B. Predict whether ∆S is positive or negative for the reaction: N2(g) + O2(g) → 2NO(g)
C. Which has greater entropy? 1mole of NaCl(5) or 1 mol of HCl(g)
Step by step
Solved in 4 steps
A. Predict whether ∆S is positive or negative for the reaction: N2(g) + O2(g) → 2NO(g)
B. Which has greater entropy? 1mole of NaCl(5) or 1 mol of HCl(g)
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