The Value of ΔE for a System That Performs 139

question 134

Multiple Choice

The value of ΔE for a system that performs 139 kJ of work on its surroundings and gains 54kJ of heat is ________ kJ.

• A)-85
• B)193
• C)7506
• D)85
• E)-193

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Definitions:

Signal-Detection Theory

A means to quantify the ability to discern between information-bearing patterns and random patterns that distract from the information in the presence of uncertainty.

Just Noticeable Difference

The smallest change in intensity of a stimulus that can be detected by the sensory system.

Absolute Threshold

The minimum stimulus intensity required to be detectable by the senses.

Stimulus Intensity

The magnitude or strength of a stimulus, which can affect the perception and response of the sensory system to that stimulus.