497533
Description
Flashcards by sadies-geniole, updated more than 1 year ago
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Created by sadies-geniole
almost 11 years ago
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| Question | Answer |
| Calorimety | Technological process of measuring energy change in chemical system |
| Chemical change | A change in chemical bonds between atoms resulting into a new substance |
| Chemical system | A set of reactants and products under study, represented by a chemical equation |
| Endothermic | Absorbing thermal energy as heat flows into the system |
| Enthalpy change | The difference in enthral pies of reactants and products during a change |
| Exothermic | Releasing thermal energy as heat flow out of the system |
| Heat | Amount of energy transferred between substances |
| Hess's law | The value of the H for any reaction that can be written in steps equal to H for each step |
| Isolated system | An ideal system in which neither matter nor energy can move in or out |
| Molar enthalpy | The enthalpy change associated with a physical, chemical or nuclear change involving 1 mole of a substance |
| Molar enthalpy of reaction (change) | The energy change associated with the reaction of 1 mole of a substance |
| Nuclear change | A change in a proton or neutron in an atom, resulting in the formation of a new atom |
| Open system | 1 in which both matter and energy can move in or out |
| Physical change | A change in the form of a substance, in which no chemical bonds are broken |
| Potential energy diagram | A graphical representation of the energy transferred during a physical or chemical change |
| Specific heat capacity | Quantity of heat required to raise the temperature of a unit mass of a substance 1*C or 1K |
| Standard enthalpy of formation | The quantity of energy associated with the formation of 1 mole of a substance from its elements in standard state |
| Surroundings | All matter around the system that is capable of absorbing or releasing thermal energy |
| Temperature | Average kinetic energy of the practicles in a sample of matter |
| Thermal energy | Energy available from a substance as a result of the motion of its molecules |
| Thermochemistry | The study of the energy changes that accompany physical or chemical changes in matter |
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