A 200-Kg Block of Ice at 0

question 14

Multiple Choice

A 2.00-kg block of ice at 0.00°C is dropped into a very large lake at 25.0°C and completely melts.For water,the heat of fusion is 3.35 × 10⁵ J/kg,the heat of vaporization is ,and the specific heat is .The net change in entropy of the system consisting of the ice and the lake due to this melting process is closest to

• A) 2.45 × 10³ J/K.
• B) 2.24 × 10³ J/K.
• C) 2.06 × 10² J/K.
• D) -2.45 × 10³ J/K.
• E) -2.06 × 10² J/K.

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Definitions:

Circadian Rhythms

Biological processes that follow an approximately 24-hour cycle, affecting sleep, behavior, and physiological processes in living organisms.

Melatonin

A hormone produced by the pineal gland that regulates sleep and wake cycles, often used as a supplement to treat sleep disorders.

Delayed Sleep Phase Type

A condition where an individual's sleep is delayed by two or more hours beyond the conventional bedtime, leading to difficulty in waking up at a desired time.

Nightmare Disorder

Sleep disorder characterized by nightmares frequent enough to cause significant distress or impairment in functioning.