Use the Following to Answer the Question:
-The Internal $\circ$

question 71

Multiple Choice

Use the following to answer the question:
-The internal energy for a diatomic gas is given by U = 5nRT/2.Calculate the internal energy of a 100 g mixture of oxygen (20%) and nitrogen (80%) gas at 25 ^$\circ$ C.(The molar weight of O₂ = 32 g,and the molar weight of N₂ = 28 g.)

• A)21.6 kJ
• B)1.80 kJ
• C)12.1 kJ
• D)13.0 kJ
• E)1.10 kJ

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Definitions:

Subsidence

The process by which the earth's surface sinks or lowers, often due to natural underground material movement or removal of groundwater.

Average Gradient

The average gradient refers to the rate of elevation change over a particular distance, often used in geographical and hydrological analysis to describe slopes.

Base Level

The lowest point to which erosion by running water can lower the landscape, ultimately the sea level or lake level where rivers end.

Base Level

The lowest point to which a river can erode its channel, often sea level for rivers that flow directly into the oceans, but can be a lake or resistant rock layer for other rivers.