How Much Heat Must Be Added to a 8 $14 ^ { \circ } \mathrm { C } ?$

question 216

Multiple Choice

How much heat must be added to a 8.0-kg block of ice at -8°C to change it to water at $14 ^ { \circ } \mathrm { C } ?$ The specific heat of ice is 2050 J/kg ? C°, the specific heat of water is 4186 J/kg ? C°, the latent heat of fusion of ice is 334,000 J/kg, and 1 cal = 4.186 J.

• A)780 kcal
• B)140 kcal
• C)180 kcal
• D)810 kcal
• E)730 kcal

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Definitions:

Correlation Coefficient

A numerical measure that quantifies the strength and direction of a linear relationship between two variables, ranging from -1 to 1, where values close to 1 or -1 indicate a strong linear relationship.

Linear Relationship

A type of relationship between two variables where the change in one variable is consistently associated with a change in the other variable in a manner that can be depicted with a straight line.

Coefficient Of Correlation

The coefficient of correlation is a statistical measure that calculates the strength and direction of a linear relationship between two variables.

Coefficient Of Determination

A statistic that measures the proportion of the variance in the dependent variable that is predictable from the independent variable(s).