Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
Mendeleev's periodic law
|
When the elements are arranged in order of increasing atomic number, certain sets of properties recur periodically
|
|
stoichiometry.
|
The study of the numerical relationship between
chemical quantities in a chemical reaction |
|
Limiting reactant
|
the reactant that is completely consumed in a chemical reaction
|
|
Theoretical yield
|
the amount of product that can be made in a chemical reaction based on the amount of limiting reactant
|
|
actual yield
|
the amount of product actually produced by a chemical reaction
|
|
exothermic reactions
|
the sign of the enthalpy change is negative when:
– Thermal energy is produced by the reaction. – The surroundings get hotter. – Ex: For the reaction CH4(s) + 2 O2(g) → CO2(g) + 2 H2O(l), the ΔHrxn = −802.3 kJ per mol of CH4. |
|
endothermic reactions
|
the sign of the enthalpy change is positive when:
– Thermal energy is absorbed by the reaction. – The surroundings get colder. – Ex: For the reaction N2(s) + O2(g) → 2 NO(g), the ΔHrxn = +182.6 kJ per mol of N2. |