In Which Process Is ΔH = ΔU

question 90

Multiple Choice

In which process is ΔH = ΔU?

• A) Two moles of ammonia gas are cooled from 325°C to 300°C at a constant pressure of 1.2 atm.
• B) One gram of water is vaporized at 100°C and 1 atm.
• C) Two moles of hydrogen iodide gas react to form hydrogen gas and iodine gas in a 40-L container.
• D) Solid calcium carbonate is heated to form solid calcium oxide and carbon dioxide gas in a container with variable volume.
• E) One mole of solid carbon dioxide sublimes to the gas phase.

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Definitions:

Participant Observation

A method used in social science research involving the immersion of the researcher in the environment of their subjects to observe and engage in their activities to gain a deeper understanding of their culture or behavior.

Median

A statistical measure that represents the middle value in a given set of numbers, where half the numbers are above the median and half are below.

Arithmetic Average

A statistical measure calculated by adding a set of numbers together and then dividing by the count of these numbers.

Sociological Research

The study of society and social behavior by examining the groups, cultures, organizations, social institutions, and processes that people develop.