Two Experimental Runs Are Performed to Determine the Calorimetric Properties

question 79

Multiple Choice

Two experimental runs are performed to determine the calorimetric properties of an alcohol which has a melting point of -10° C.In the first run,a 200-g cube of frozen alcohol,at the melting point,is added to 300 g of water at 20°C in a styrofoam container.When thermal equilibrium is reached,the alcohol-water solution is at a temperature of 5°C.In the second run,an identical cube of alcohol is added to 500 g of water at 20°C and the temperature at thermal equilibrium is 10°C.The specific heat capacity of water is 4190 J/kg ∙ K.Assume no heat is exchanged with the styrofoam container and the surroundings.What is the specific heat capacity of the alcohol?

• A)1700 J/kg ∙ K
• B)1900 J/kg ∙ K
• C)2100 J/kg ∙ K
• D)2300 J/kg ∙ K
• E)2500 J/kg ∙ K

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Definitions:

Glucose

A simple sugar and important energy source for the body, serving as the primary fuel for the brain and muscles during physical activity.

Liver

A vital organ in the body that processes nutrients, detoxifies harmful substances, and produces bile.

Skeletal Muscles

A type of striated muscle tissue which is under voluntary control and is responsible for movement of the skeleton, as well as posture and body position.

Vitamins

Essential organic substances necessary for healthy growth and nutrition, which must be included in the diet in small amounts due to the body's inability to produce them.