A Container Contains a 200 ML of 100% Proof Alcohol $\circ$

question 9

Multiple Choice

A container contains a 200 mL of 100% proof alcohol (i.e.,it has 50% ethyl alcohol and 50% water by volume) at 20 ^$\circ$ C.How much heat is needed to bring the mixture to the boiling point of the alcohol? (assume that the specific heat in the 100% proof can be treated as due to the alcohol and water separately,and the density,boiling point and specific heat of alcohol are 0.81 g/cm³,78 ^$\circ$ C,and 2.4 J/(g.C ^$\circ$ ) ,respectively)

• A)32650 J
• B)35525 J
• C)11136 J
• D)17400 J
• E)48557 J

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Definitions:

Closed-ended Question

A type of question formulated to receive a specific, often "yes" or "no", answer.

Active Listening

The act of listening attentively to the speaker’s message and responding by giving appropriate feedback to show that you understand what the speaker is saying. Restating the speaker’s message in your own words to confirm that you accurately interpreted what was said.

Passive Listening

The act of listening attentively to the speaker's message and responding to the speaker by providing verbal or nonverbal cues that encourage the speaker to continue. In effect, saying “I'm listening, please go on.”

Reflective Listening

A communication technique involving actively listening to a speaker, then repeating back what was said to confirm understanding and empathy.