The Heat of Vaporization of a Certain Refrigerant Is 156

question 52

Multiple Choice

The heat of vaporization of a certain refrigerant is 156 J/g. Calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one-ounce (1 oz = 28 g) ice cubes starting with the water at 13°C.Heat capacity (water) = 4.184 J/g °C
ΔH_fusion (water) = 333 J/g

• A) 0.85 kg
• B) 1.2 kg
• C) 4.3 kg
• D) 1.1 kg
• E) 0.17 kg

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Definitions:

Metabolizes

The biochemical process by which organisms convert substances into energy and materials necessary for cellular function and growth.

Dopamine

Neurotransmitter in the brain, excess amounts of which have been thought to cause schizophrenia.

Reuptake

Process in which a sending neuron reabsorbs some of the neurotransmitter in the synapse, decreasing the amount left in the synapse.

Cocaine

A powerful stimulant drug derived from the coca plant, known for its euphoric effects and high potential for addiction.