CHEM 101 Lecture Notes - Lecture 8: Joule, Calorie, Sodium Chloride
Get access
Related textbook solutions
Chemistry: Structure and Properties
Basic Chemistry
Principles of Chemistry Molecular Approach
Chemistry: Structure and Properties
Principles of Chemistry Molecular Approach
Chemistry: A Molecular Approach
Chemistry: A Molecular Approach
Principles of Chemistry: A Molecular Approach
Chemistry: The Central Science
Related Documents
Related Questions
A 51 g aluminum block initially at 27.5 °C absorbs 715 J of heat. What is the final temperature of the aluminum? Express your answers using one decimal place and include the appropriate units.
Substance | Specific heat capacity, c (J/g °C) at 298 K |
Elements | |
Lead | 0.128 |
Gold | 0.128 |
Silver | 0.235 |
Copper | 0.385 |
Iron | 0.449 |
Aluminum | 0.903 |
1. H2SO4 (aq) â SO3 (g) + H2O (l) ÎH = 132 kJ
How much heat (in kJ) is transferred when 777 µg of SO3 (g) are formed?
2. N2 (g) + 3H2 (g) â 2NH3 (g) ÎH = -92.6 kJ
Calculate ÎH (in kJ) for the formation of 20.4 mol of NH3
3. 4 NH3 (g) + 5 O2 (g) â 6 H2O (g) + 4 NO (g) ÎH = - 51.7 kJ
Calculate the amount of heat transfered in kJ when 45.0 g of NH3 are burned in the reaction.
4. The specific heat of water is 4.184 J/goC. How many J of heat are needed to change the temperature of 39.5 g of water from 15.9 to 96.6oC?
Mass | Ã | Specific Heat | Ã | Tf - Ti (or ÎT) | = | ÎH |
______ g | Ã | _____ Jg oC (or K) | Ã | _____ oC (or K) | = | _____J |
5. The specific heat of ethanol is 2.46 J/goC. How many J of heat are needed to change the temperature of 28.7 g of ethanol from 25.0 to 47.3oC?
Mass | Ã | Specific Heat | Ã | Tf - Ti (or ÎT) | = | ÎH |
______ g | Ã | _____ Jg oC (or K) | Ã | _____ oC (or K) | = | _____J |