Specific Heat Practice of Physics | Answer Key

University:
High School
Course:
High School Physics
Academic year:

2020
Views:

196

Pages:

2
Author:

Draven Pennington

Q = mcΔT Worksheet #1 Specific Heat Practice Important equation: Q = mcΔT For Water, c = 4.184 J/g°C or c = 1.00 cal/g°C How much heat is transferred when 57 grams of mercury cools from 76°C to 18°C? The specific heat of mercury is 0.14 J/g°C. [Ans: -460 J] How much energy is transferred when 70 grams of ethanol is heated from 21°C to 68°C? The specific heat of ethanol is 2.44 J/g°C. [Ans: 8000 J] How much heat is required to increase the temperature of 20.0 grams of water by 26.0°C? The specific heat of water is 4.184 J/g°C. [Ans: 2180 J] What is the specific heat of a substance that absorbs 2500 joules of heat when a sample of 1000.0 g of the substance increases in temperature from 10.0°C to 70.0°C? [Ans: 0.042 J/g°C] A block of aluminum weighing 140. g is cooled from 98.4°C to 62.2°C with the release of 1080 joules of heat. From this data, calculate the specific heat of aluminum. [Ans: 0.213 J/g°C] What is the specific heat capacity of silver metal if 55.00 g of the metal absorbs 47.3 calories of heat and the temperature rises 15.0°C? [Ans: 0.0573 cal/g°C] Q = mcΔT Worksheet #1 Specific Heat Practice A total of 54.0 joules of heat are absorbed as a piece of lead is heated from 12.0°C to 42.0°C. If the specific heat of lead is 0.129 J/g °C, what mass of lead was used? [Ans: 14.0 g] What is the mass of a sample of metal that is heated from 58.80°C to 88.90°C with a specific heat of 0.4494 J/g°C, if Q = 4500.0 J? [Ans: 332.7 g] A cube of gold weighing 192.4 g is heated from 30.0°C to some higher temperature, with the absorption of 226 joules of heat. The specific heat of gold is 0.030 J/g°C. What was the final temperature of the gold? 1 [Ans: 69 °C] If 500.0 J of energy are added to 25.0 g of water at 0.0 °C, what is the final temperature of the water? (The heat capacity of water is 4.184 J/g°C)