Use the Following to Answer the Question

question 5

Multiple Choice

Use the following to answer the question:
-The graph shows the temperature of a 1.0-g sample of material as heat is added to it.The material is initially a solid at 10ºC.The pressure remains constant,and there is no chemical change.The heat of fusion of the material is

• A)10 cal/g
• B)50 cal/g
• C)30 cal/g
• D)90 cal/g
• E)None of these is correct.

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Definitions:

Random Error

Variability in data that is caused by unpredictable and unavoidable fluctuations in the measurement process.

Linearly Correlated

A statistical relationship between two variables in which changes in one variable are associated with proportional changes in another variable along a straight line.

Normally Distributed

Describes a symmetric, bell-shaped distribution of data where the mean, median, and mode are equal, prevalent in many natural phenomena.

Coefficient of Determination

A statistical measure that explains the proportion of the variance for a dependent variable that's explained by an independent variable or variables in a regression model.