Evaporation of 1kg of Water from a Solution in a Single

question 21

Multiple Choice

Evaporation of 1kg of water from a solution in a single effect evaporator requires about __________ kg of steam.

• A)0.4 - 0.6
• B)1-1.3
• C)1.8-2
• D)2 - 2.4

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Definitions:

Internal Validity

The degree to which a study’s results are attributable to the independent variable, rather than other factors, indicating the study accurately reflects the relationship being tested.

Confounding Variable

An external influence that can affect the results of an experiment by varying along with the independent variable, potentially misleading the outcome.

Pretest-Posttest

A research design involving measurement before and after a specific intervention to assess its effects.

Sensitized

The process or state of becoming more aware or responsive to something, often used in the context of immune response or psychological conditioning.