Calorimetry: Two Experimental Runs Are Performed to Determine the Calorimetric

question 79

Multiple Choice

Calorimetry: Two experimental runs are performed to determine the calorimetric properties of an alcohol that 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 5.0°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 of water is 4190 J/kg · K. Assume that no heat is exchanged with the styrofoam container and with the surroundings. The specific heat of the alcohol is closest to

• 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:

Concise Language

The use of few words to convey much information or meaning, avoiding unnecessary details or filler words.

Cardiovascular Danger

A term referring to the risk factors that can lead to diseases affecting the heart and blood vessels.

Blood Pressure

The pressure of circulating blood on the walls of blood vessels, often measured for diagnosis since it is closely related to the force and rate of the heartbeat.

Consistency

The quality of achieving a level of performance which does not vary greatly in quality over time.