Chem-Module 13
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| When a reaction is exothermic, energy will be thought of as a _______ in the reaction. | Product
🗑
|
||||
| When a reaction is endothermic, energy will be thought of as a ________. | Reactant
🗑
|
||||
| Potential energy= | Energy stored in chemical bonds of a substance
🗑
|
||||
| Kinetic energy= | Energy that is released or absorbed
🗑
|
||||
| Change in Enthalpy (⌂H) | The energy change that accompanies a chemical reaction
🗑
|
||||
| 1 calorie= | 4.184 Joules
🗑
|
||||
| ⌂H is _______ for endothermic reactions | Positive
🗑
|
||||
| ⌂H is _______ for exothermic reactions | Negative
🗑
|
||||
| ⌂H= | Energy required to break bonds - Energy released when bonds form
🗑
|
||||
| Hess's Law | Enthalpy is state function and is therefore independent of path.
🗑
|
||||
| State function | Any quantity that depends solely on the final destination, not the way you get to that destination.
🗑
|
||||
| Enthalpy of formation (⌂Hf) | The ⌂H of a formation reaction
🗑
|
||||
| Standard conditions | 25 C, 1.00 atm
🗑
|
||||
| ⌂H^0= | Σ⌂Hf^0 (products) - Σ⌂Hf^0 (reactants)
🗑
|
||||
| The standard enthalpy of formation of an element in its elemental form is _____ | zero
🗑
|
||||
| Hess's Law is more accurate because it | also takes into account the phase of the substance involved
🗑
|
||||
| Activation energy | The energy necessary to start a chemical reaction
🗑
|
||||
| Entropy | A measure of the disorder that exists in any system
🗑
|
||||
| The Second Law of Thermodynamics | The entropy of the universe must always either increase or remain the same. It can never decrease
🗑
|
||||
| The ______ state has the least amount of entropy associated with it. | solid
🗑
|
||||
| The entropy of the ______ state is higher than the solid state. | liquid
🗑
|
||||
| The entropy of the ______ state is the highest of all | gaseous
🗑
|
||||
| The entropy of a system ______ with increasing temperature | increases
🗑
|
||||
| The entropy of a system _____ as the matter it contains increases | increases
🗑
|
||||
| ⌂Suniverse | ≥0
🗑
|
||||
| ⌂S^0= | ΣS^0 (products) - ΣS^0 (reactants)
🗑
|
||||
| All substances, even elements, have an _______ _______ | absolute entropy
🗑
|
||||
| ⌂G= | ⌂H - T × ⌂S
🗑
|
||||
| When ⌂G < 0, then reaction is _________ with the Second Law and is thus _________ | consistent, spontaneous
🗑
|
||||
| ⌂G > 0, then the reaction ______ proceed, because it ______ the Second Law | cannot, violates
🗑
|
||||
| If the reaction is ______ and ⌂S is ______, then reaction will never occur. | endothermic, negative
🗑
|
||||
| If the reaction is _____ and ⌂S is _____, the reaction will always be spontaneous. | exothermic, positive
🗑
|
||||
| ⌂G^0= | Σ⌂Gf^0 (products) - Σ⌂Gf^0 (reactants)
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Created by:
akikoandpoog
Popular Chemistry sets