The Specific Heat of Liquid Ethanol, C₂H₅OH(l), Is 2

question 44

Multiple Choice

The specific heat of liquid ethanol, C₂H₅OH(l) , is 2.46 J/g·°C and the heat of vaporization is 39.3 kJ/mol.The boiling point of ethanol is 78.3 °C.What amount of enthalpy is required to heat 50.0 g of liquid ethanol from 23.0 °C to ethanol vapor at 78.3 °C?

• A)42.7 kJ
• B)49.5 kJ
• C)179 kJ
• D)1970kJ
• E)6840 kJ

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Definitions:

Random Sampling

A method of selecting a sample from a population in a way that every member of the population has an equal chance of being included.

Random Assignment

A method used in experiments to distribute individuals randomly across experimental groups, ensuring that each participant has an equal chance of being assigned to any given group.

Naturalistic Observation

An observational method in which participants are viewed in their authentic surroundings without any meddling by the researcher.

Double-Blind Procedure

An experimental method in which neither the participants nor the experimenters know who is receiving a particular treatment, used to eliminate bias.