A Certain Humidifier Operates by Raising Water to the Boiling

question 5

Multiple Choice

A certain humidifier operates by raising water to the boiling point and then evaporating it.Every minute 30 g of water at 20°C are added to replace the 30 g that are evaporated.The heat of fusion of water is 333 kJ/kg, the heat of vaporization is 2256 kJ/kg, and the specific heat is 4190 J/kg How many joules of energy per minute does this humidifier require?

• A)4800 J/min
• B)18,600 J/min
• C)24,600 J/min
• D)77,700 J/min
• E)10,100,000 J/min

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Definitions:

Transtheoretical Model

A theory of behavior change that evaluates an individual's readiness to act on a new healthier behavior, and provides strategies or processes to guide the individual.

Contemplation Stage

The stage in which people are aware of a problem and are thinking about overcoming it but have not yet made a commitment to take action.

Action Stage

A phase in the Transtheoretical Model of behavioral change where individuals are actively making modifications to their lifestyle or behavior to overcome a problem.

Consciousness Raising

A process of increasing awareness about social, political, health, or personal issues, often as a component of social movements or personal development strategies.