A Thermally Isolated Sample of an Ideal Gas at a Fixed

question 39

Multiple Choice

A thermally isolated sample of an ideal gas at a fixed temperature is confined to one half of a container by an impermeable membrane.The other half of the container is evacuated.The membrane is then pierced and the gas is allowed to expand freely and to double its volume as shown.Which one of the following statements is true concerning this situation?

• A)The process is reversible.
• B)This is an isothermal process.
• C)The entropy of the gas decreases.
• D)The internal energy of the gas must decrease.
• E)The temperature of the gas decreases to one-half of its original value.

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Definitions:

Contraction

The process in which muscle fibers shorten in length, resulting in movement or force generation.

Connective Tissue

A type of biological tissue with the primary function of supporting, connecting, or separating different types of tissues and organs in the body.

Transport

The movement of substances across cell membranes and throughout the body.

Exocrine

Glands that secrete their products through ducts either out of the body or into the digestive system, unlike endocrine glands, which secrete hormones directly into the blood.