Two Solutions (The System),each with a Volume of 25

question 120

Multiple Choice

Two solutions (the system) ,each with a volume of 25.0 mL at 25.0°C,are mixed in a beaker.A reaction occurs between them,and the temperature rises to 35.0°C.After the products have equilibrated with the surroundings,the temperature is again 25.0°C and the total volume is 50.0 mL.No gases are involved in the reaction.Which relationship concerning the change from initial to final states (both at 25.0°C) is correct?

• A)ΔU = 0
• B)ΔH = 0
• C)ΔU > 0
• D)q = 0
• E)W = 0

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Definitions:

Histology

The study of the microscopic structure of tissues.

Tissues

Groups of cells that perform a similar function and are the building blocks of organs and structures in the body.

Cardiovascular System

The system comprising the heart and blood vessels, responsible for circulating blood throughout the body to supply oxygen and nutrients.

Organization Level

Refers to the hierarchy in biological systems, ranging from atoms to biosphere, delineating the complexity and interaction levels.