Term
| The rates of chemical reactions can be manipulated by |
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Definition
- Changing the chemical reactions
- Changing the temperature of the reaction
- Introducing catalysts |
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Term
| The decomposition of hydrogen peroxide is accomplished because... |
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Definition
- added KI to the mixture in the cylinder which catalyzed the reaction.
- used concentrated (30%) reagent grade H2O2 instead of the 3% solution you buy in brown bottles in the grocery store. |
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Term
| According to kinetic molecular theory, reactions occur more rapidly at higher temperatures because |
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Definition
- molecules move faster at higher temperatures.
- molecules collide more frequently at higher temperatures.
- molecules have more energy at higher temperatures. |
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Term
| Water has an unusually ______ heat capacity for a molecule of it's size |
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Definition
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Term
| Kinetic Molecule theory: reactions occur more rapidly at higher temperatures because... |
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Definition
| molecules: move faster at higher temperatures, collide more frequently at higher temperatures, have more energy at higher temperatures |
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Term
| energy is most conveniently delievered |
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Definition
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Term
| the rate of energy output or input is |
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Definition
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Term
| the amount of heat necessary to change a given amount of a substance by 1 degree C is known as... |
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Definition
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Term
| Water has an unusually ________ heat capacity for a molecule of its size. |
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Definition
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Term
| silver has a _______ heat capacity than water |
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Definition
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Term
| process or reaction that releases energy from the system usually in the form of heat, light, electricity or sound. |
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Definition
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Term
| process or reaction in which the system absorbs energy form the surroundings in the form of heat |
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Definition
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Term
| What can bind to hemoglobin in place of oxygen causing the heart and respiratory system to work harder? |
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Definition
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Term
| What energy unit is used for nutritional measurements? |
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Definition
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Term
| Are there cleaner fuel options than fossil fuels? |
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Definition
| yes: solar, wind, hydroelectric, geothermal |
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Term
| What uses a heliostat to focus the sun's energy and is considered to be a hybrid solar technology? |
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Definition
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Term
| What is the most common type of semiconductor found in photovoltaic cells? |
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Definition
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Term
| another name for the Kelvin temperature |
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Definition
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Term
| the SI unit of energy is the... |
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Definition
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Term
| The solar energy absorbing molecules of plants that power photosynthesis are called... |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| What will increase the rate of a chemical reaction? |
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Definition
raising the temp
increasing the concentration of the reactants
adding a catalyst |
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Term
| Which physical state has the greatest entropy? |
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Definition
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Term
| the pollutants of burning natural gas are.. |
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Definition
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Term
| the freezing of water is... endothermic/exothermic |
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Definition
| exothermic because it gathers cold and releases heat enabling the water to freeze. |
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Term
| recycling aluminum beverage cans is an economically and energetically reasonable activity, but also an example of the fact that... |
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Definition
| decreasing entropy is a nonspontaneous process. |
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Term
| moving heat from a colder space to a hotter space |
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Definition
| the first law of thermodynamic |
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Term
| organizing temperature gradients |
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Definition
| the second law of thermodynamics |
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Term
| examples of increasing entropy |
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Definition
water boiling
a child scattering toys around the room |
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Term
| an endothermic system must cause a ______ in energy for the system's surroundings |
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Definition
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Term
| a system that produces order must only proceed with a corresponding ____ of order for its surroundings |
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Definition
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Term
| Who derived an equation describing this competition or balance between entropy and enthalpy? |
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Definition
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Term
| The third law of thermodynamics |
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Definition
| you can never attain absolute zero |
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Term
| the presence of H2O2 on an open wound prevents infection from... |
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Definition
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