question | Answer |
catalyst | a substance that increases the rate of a chemical reaction by lowering activation energies but is not itself consumed in the reaction |
chemical change | a process involving one or more substances changing into a new substance also called a chemical reaction |
phase changes | a change of state solid liquid or gas |
diatomic | two atoms N2 Cl2 F2 H2 I2 Br2 O2 |
Double replacement | A chemicall reaction that involves the exchange of positive ions between two compunds and products either |
precipate | a solid produced during a chemical reaction in a solutionb |
chemucal bonds | the force that holds two atoms together may form by the attraction of a positive ion for a negative ion or by the attraction of a positive nucleus for negative electrons |
thermochemistry | study of changes of energy changes that happen during chemical and phases changes |
Boyle's law | The volume of a given amount of gas held at a constant temperature |
Charles law | Volume of a given mass of gas is directly proportional to its kelvin tempature at constant pressure |
combined gas law | relationship among pressure volume and tempature of a fixed amount of gas |
molar volume | for a gas the volume that one mole occupitios at 0.0 celsius at 1.00atm pressure |
dipole dipole forces | The attracttion between oppositely charged regions of polar molecules |
sublimation | the energy requiring processs by a solid changes directly into a gsas without first becoming a liwquid. |
evaporation | a phase change liquid to gas |
condensation | phase change gas to liquid |
melting | phase change solid to liquid |
freezing | phase change liquid to solid |
deposition | phase change gas to solid |
enthalpy | change in energy due to a chemic reaction or or phase change |
symbol J | Heat variable is q |
symbol g | grams measures mass variable m |
symbol kpa | pressure P |
symbol atm | pressure p |
symbol L | Liters V |