question 20 In a recent year, the federal government removed Rocky gray wolf fro

Question

question 20

In a recent year, the federal government removed Rocky gray wolf from the list of endangered resulting in the first Rocky gray wolf hunting in decades. During this season, about one-fourth of the population, or an estimated 500 wolves, were killed. Approximately how may Rocky gray wolves had lived in the wild before the hunt began? (Source:) In chemistry, an endothermic reaction is one that heat. As a result of an endothermic reaction, the temperate of a solution dropped by 19.8 degrees Celsius to 7.6 degree C. What was the temperature of the solution before the reaction took place? (Source: Timberlake, Chemistry: An Introduction to General, Organic, and Biological Chemistry)

Explanation / Answer

Let the temperature of the solution before reaction was T oC.

From, the question, the drop in the temperature (dT) after reaction is 19.8 oC and reached (Tf) to 7.6 oC.

dT=19.8 oC and Tf =7.6 oC

so, Tf = T - dT

or, T = Tf + dT

put the value of Tf and dT in above equation.

T = 7.6 + 19.8 = 27.4

T = 27.4 oC

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