Chemistry

Temperature and Specific Heat Problem Set Name: __________________________

Chem B11 Lab Section:______________________

1. Temperature Conversions

Convert the following temperature measurements to the indicated temperature scale.

a. 151 °F to °C d. 89 °C to °F

b. -51 °C to K e. 243 °F to K

c. 482 K to °C f. 32 K to °F

2. Specific Heat Calculations

Calculate the change in energy (q) for the following situations. Refer to the given table for specific heat values. Show your work for full credit.

a. How much energy in kJ is required to heat 55 g of silver from 0 °C to 75 °C?

b. How much energy in kcal is required to heat 100.0 g of ethanol from -35°C to 35 °C?

c. How much energy is released in cal when 34.8 g of titanium is cooled from 150. °C to 0 °C?

3. Energy in Nutrition

a. How many total Calories would a person consume if they ate a cheeseburger (14 g fat, 25 g carb, 17 g protein), fries (17 g fat, 48 g carb, 4 g protein), and a soda (0 g fat, 44 g carb, 0 g protein)?

b. The diet of the person in part A limits them to only 500 Calories from fat per day. If they later eat an avocado (234 Calories, 12 g carb, 2.9 g protein), did they go over their limit?

4. Heat of fusion and heat of vaporization

a. How many kcal does it take to melt 50.0 g of ice at 0 °C?

b. How much total energy in kJ would it take to heat 100.0 g of 30.0 °C water until it reaches its boiling point and then completely evaporates? (hint: use both a heat of vaporization and a specific heat equation).

Bakersfield College Wade Ellis