Specific Heat Capacity Worksheet 5ao64

Worksheet – Calculations Involving Specific Heat

1. For q = m ⋅ c ⋅ ΔT : identify each variable by name & the units associated with it 2. Heat is not the same as temperature, yet they are related. Explain how they differ. a. Perform calculations using (q = m ⋅ c ⋅ ΔT) 1. Gold has a specific heat of 0.129 J/(gxoC). How many joules of heat energy are required to raise the temperature of 15 grams of gold from 22oC to 85oC?

b. Determine if it's endothermic or exothermic 2. An unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature increase of 15oC. What is the specific heat of the substance?

Endothermic or exothermic?

2. If the temperature of 34.4g of ethanol increases from 25oC to 78.8oC, how much heat has been absorbed by ethanol? The specific heat of ethanol is 2.44 J/(gxoC)

Endothermic or exothermic? 3. Graphite has a specific heat of 0.709 J/ (gxoC). If a 25g piece of graphite is cooled from 35oC to 18oC, how much energy was lost by the graphite?

Endothermic or exothermic? 4. Copper has a specific heat of 0.385 J/ (gxoC). A piece of copper absorbs 5000 J of energy and undergoes an energy change from 100oC to 200oC. What is the mass of the copper?

Endothermic or exothermic? 5. 45 grams of an unknown substance undergoes a temperature increase of 38oC after absorbing 4172.4 J. What is the specific heat of the substance? Look at the table on page 513 of your book and identify the substance.

Endothermic or exothermic? 6. A 40. g sample of water absorbs 500 Joules of energy. How much did the water temperature change? The specific heat of water is 4.18 J/(gxoC).

Endothermic or exothermic? 7. If 335g of water at 65.5oC loses 9750 J of heat, what is the final temperature of water? Liquid water has a specific heat of 4.18 J/(gxoC).

Endothermic or exothermic?

Endothermic or exothermic?