Direded Reading for Section 2 .Rates of Chemical Content Mastery Reactions Directions. Write the word true in the space next to each w statement that is true. The statement is tale rewrite the statement to make it true on the lines provided

1. A change in state is a physical change.

2. Catalysts speed chemical reactions but are not changed by them.

3. Heat, light, or change in odor can indicate a physical change. Meeting Individual Needs

4. Activation energy is the minimum for reactions to start

5. Cold acually speeds up reaction rates.

6. A low concentration of a chemical slows reaction rate,

7. Chemical reactions occur at the same rate no matter what the size of the reactant partides​

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.

Mercury turns to vapor at 629.88 k how much heat is lost 175 g of mercury vapor at 650 current condenses to a liquid at 297 ca mercury turns to weber at 629.88 kelvin how much he is lost 175 g of mercury vapor and 650 coming condensers to liquidate 297 kevin