Heat Is Added to a Substance at a Constant Rate

question 64

Multiple Choice

Heat is added to a substance at a constant rate. The substance starts as a solid and is melted; the liquid is heated and vaporized; finally, the vapor is heated. This process is shown in the graph. The specific heat of the liquid can be found by

• A) multiplying the length of B in seconds) by the rate at which heat is added, and dividing by the mass of the substance.
• B) multiplying the length of D in seconds) by the rate at which heat is added, and dividing by the mass of the substance.
• C) dividing the rate at which heat is added by the product of the slope of A and the mass of the substance.
• D) dividing the rate at which heat is added by the product of the slope of C and the mass of the substance.
• E) dividing the rate at which heat is added by the product of the slope of E and the mass of the substance.

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Definitions:

Cholesterol

A lipid molecule essential for the structure of cell membranes and the synthesis of hormones.

Estrogen

A group of steroid hormones that play a crucial role in regulating the reproductive system, development of female secondary sexual characteristics, and menstrual cycle.

Triglyceride

Triglycerides are a type of fat (lipid) found in your blood, coming from either dietary fats or produced in the body, used as a source of energy or stored as fat.

Polysaccharide

A complex carbohydrate composed of long chains of monosaccharide units bonded together, serving as energy storage or as structural components.