Partial preview of the text
Download Solved Worksheet for Introduction to Specific Heat Capacities and more Exercises Chemistry in PDF only on Docsity!
Name: Per: Worksheet- Introduction to Specific Heat Capacities Heating substances in the sun: The following table shows the temperature after 10.0 g of 4 different substances have been in direct sunlight for up to 60 minutes. Time (minutes) Air (° C) Water (° C) Sand (° C) Metal (° C) O (initial) 25°C 25°C 2526 25°C 15.0 min 28.9°C 26.2°C 30°C 35°C 30.0 min 32.5°C 27.5°C 3586 45°C 45.0 min 36.2°C 28.8°C 40°C 55°C 60,0 min 40°C 30°C 45°C 65°C Step 1: Create a line graph for each substance on graph below. Label the substances. Temperature (°C) ror S ° anyone Temperature vs Heating Time 1. Or th fa: 20 30 40 Time (minutes) Step 2: Answer questions der the substances based on the time required to heat em from : slowest | Wetter air sand stest MC bah 2. Which do you think will cool the fastest? Explain metal 3. When you boil water in a pot on the stove, which heats faster, the metal or the water? Explain. , : 1 an Metal. The metol's temperature. menreased MONE inthe somes OUNCUD i 4. Why do you think different substances heat up and cool down at different rates? OF time. They have different heat capacities , COiffFerenr $+ ructures) ***Specific heat capacity = the amount of heat needed to raise the temperature of 1 g of a substance by 1 degree. *** 5. Based on the definition above, which of the 4 substances do you think has: a) the highest specific heat capacity? Water (see < raph) b) the lowest heat ca pacity? Metal Here are the heat capacities of the four substances: 4.18 J/g °c, 1.00 J/g °c, 0.80 J/g °c, & 0.60 J/g °c. Match & then label each substance with its specific heat capacity on the graph. 7. If something has a high specific heat capacity will it take a lot of heat ora little heat to change its temperature? Explain. (carefull Use the definition, your graph, and the data from #6) A tot! A high heat capacity means it requires 8. Explain your thinking. Bosh tub. The Sevinming Pool has more. mass. & More heat to ncrease Oo ii +e : c. Assuming they both start at the same temperature, which will heat up faster, a swimming peolor a bath tub? 
