Prelaboratory Questions Name Laboratory Section 1. The temperature of a 15.0 g sample of a metal (specific heat 0.040 J/g-°C) is raised by 18.2°C. How much heat (in J) has been absorbed by the metal? 2. A calorimeter and its contents have a heat capacity of 70 J/°C. A reaction occurs in this calorimeter at atmospheric pressure. The temperature of the system rises 10.5°C when one mole of product is formed. Calculate the heat change for this reaction. 3. If 100 g of a solution (specific heat of 0.32 J/g.°C) undergoes a reaction in which 74.84 T of heat is released, what is the temperature change (AT) of this solution? Does the tem- perature of the solution increase or decrease? 4. 30.0 g of a substance (molar mass: 46 g/mol) required 262 J of heat to raise its temperature S0.02 0 to 37.4°C. What is the specific heat per gram and per mole of this substance? (continued on next page) 125

Every year Every second (1 year 365 days).

A runner wants to run 3.9 miles. She knows her running pace is 4.5 km/hr. How many minutes will it take her? USE DIMENSIONAL ANALYSIS

Human fat has a density of 0.912 g cm-3.  How much volume (in cm-3) is gained by a person who gains 2.09 kg of pure fat?

When Forrest Gump "just felt like runnin", it is estimated he ran 3.0634 x 10 km. Assuming an average running speed of 6.00 mph and Forrest ran 12 hours a day, how many days was he running? (1milc = 1.60934 km)

1) (0.7546 m)(0.89 m) [Select] 2) 143.22 cm² / 13.3 cm = [Select] m² cm

The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.