Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Unit 8 Study Guide
Energy
| Question | Answer |
|---|---|
| ______ is the ability to do work or produce heat | Energy |
| Energy cannot be ____ or ________ it can only be _______ | Created, Destroyed, Transferred |
| The ____________ in the universe is constant | Total Energy |
| A state function changes __________ of the pathway. | Independent |
| Temperature is a measure of the __ ______ of the components of a substance. | Random motions |
| Heat (Q) is measured in ______ . | Joules (J) |
| The flow of energy (from a hotter object to a colder one) is called ___ and it occurs because of a __________. | Heat, Temperature Difference |
| Define the system and the surroundings | System= part of the universe that we are studying Surroundings= everything else |
| When heat flows out of the system to its surroundings the process is _________. | Exothermic |
| When heat flows into the system from its surroundings the process is _______. | Endothermic |
| In any _______ reaction, some of the _______ energy stored in the chemical bonds is converted to ________ energy via ________. | Exothermic, Potential, Thermal, Heat |
| For an ________ reaction, the potential energy of the _____ would be lower than the potential energy of the ________. | Endothermic, Reactants, Products |
| First law of thermodynamics is really just the law of _______ of ________. | Conservation of Energy |
| Energy can be changed by the flow of ____, ____, or ___. | Work, Heat, Or Both |
| How do we solve for internal energy? | ΔE = q + w |
| What does q mean? | Heat |
| What does w mean? | Work |
| What are the two parts of thermodynamic quantities? | a number and the sign (+ or -) |
| –q is _____________ and energy flows to the ___________. | Exothermic, Surroundings |
| +q is _____________ and energy flows to the ____________. | Endothermic, System |
| –w is _____________ and work is done by the ______ on the ____________. | Exothermic, System, Surroundings |
| +w is _____________ and work is done by the _________ on the ___________. | Endothermic, Surroundings, System |
| The units of energy are the _____ and the ___________. | Joule, Calorie |
| 1 calorie = _____ joules | 4.184 |
| _________is the amount of energy required to change the temperature of one ______ of a substance by one _________. | Specific Heat Capacity, Gram, Degree Celsius |
| List some substances that have low specific heat capacities. | Metals |
| Enthalpy (ΔH) is used to determine exactly how much ___ is ____. | Energy is transferred |
| The _____ change for a reaction under constant _____ is the same as the __ for that reaction. | Enthalpy, Pressure, Heat |
| A ______ is a device used to determine the ____ associated with a chemical _______. | Calorimeter, Heat, Reaction |
| _______ states that in going from a particular set of reactants to a particular set of products, the change in enthalpy is the same whether the reaction takes place in ______ or a ________. | Hess's Law, One-Step, Series-Of-Steps |
| The sign of ∆H indicates the direction of ______. An ______ reaction = - ∆H value and an _______ reaction = + ∆H value | Heat flow, Exothermic, Endothermic |
| If the reaction is ______, the sign of ∆H is also _______. | Reversed, Reversed |
Created by:
nadelynn
Popular Chemistry sets