Suppose 150 Joules of Work Is Done on a System

question 42

Multiple Choice

Suppose 150 Joules of work is done on a system and that 300 Joules of heat are delivered to the system. Which of these is predicted by the first law of thermodynamics?

• A) The internal energy U of the system increases by 450 J, since Q = +300 and W = -150.
• B) The internal energy U of the system decreases by 150 J, since Q = -300 and W = +150.
• C) The internal energy U of the system increases by 150 J, since Q = +300 and W = +150.
• D) The internal energy U of the system does not change.

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Definitions:

Archenteron

is the primary gut that forms during early embryonic development in animals, leading to the formation of the digestive tract.

Allantois

An embryonic membrane in birds, reptiles, and mammals that is involved in gas exchange and the collection of waste products.

Caenorhabditis Elegans

A free-living, transparent nematode (roundworm), widely used as a model organism in genetic and developmental biology.

Fate Map

Diagram used by developmental geneticists that tracks the differentiation of a cell in an embryo.