By: Vaishali Shah
Key Terms
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Chemical energy: is the energy that matter possesses because of its chemical makeup. |
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Kinetic energy: is the energy an object posses due to its motion |
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Potential energy: is the energy an object has due to its position relative to other objects |
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Energy: is the capacity to do some type of work, such as moving an object, forming a new compound, or producing light. |
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law of conservation of energy: states that in any physical or chemical change, energy can change form, but the total amount of energy remain constant. |
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Heat: is the sum total of kinetic energy of the particles in a sample of matter |
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System: consists of all the components that are being studied at a given time. |
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Temperature: is a measure of the average kinetic energy of the random motion of particles in a substance. |
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Specific Heat Capacity: of a substance is the amount of heat energy required to raise the temperature of 1 g of the substance by 1K. |
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polymer- proper conditions for TFE molecules to form a long chain |
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law of conservation of mass- the products of a chemical reaction have the same mass as the reactants |
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accuracy- the extent to which a measurement approaches the true value of quantity |
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precision- the extent to which a series of measurements of the same quantity made in the same way agree with one another. |
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The Scientific Process: |
Observation
Formulating a Thesis
Testing
Theorizing
Publishing Results
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Rules of the Significant number: |
Addition and Subtraction: All values must have the same exponent before they can be added or subtracted. The result is the sum or difference of the first factors, all multiplied by the same exponent of 10.
Multiplication: The first factors of the numbers are multiplied, and the exponents of 10 are added.
Division: The fist factors of the number are divided, and the exponent of 10 in the denominator is subtracted from the exponent of 10 in the numerator.
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E=mc2 shows that mass and energy are equivalent |
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Kelvin degree temperature= 273 + Celsius degree temperature |
Questions
1. The energy an object posses because of its motion is known as ? (Kinetic energy, Potential energy)
2. Heat energy is transferred between a and its surrounding. (System, Temperature)
3. refers to how closely several measurements of same quantity agree with one another. (Accuracy, Precision)
4. What is the difference between exothermic and endothermic?
5. What is the correct Kelvin temperature with the given 25 degree Celsius temperature?
Good Chemistry Help Links:
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http://www.fordhamprep.com/gcurran/sho/sho/links/linkindex.htm |
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http://library.thinkquest.org/2923/react2.html#digits-Significant Digits |
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