For the first controlled experiment, decide how much water you want to use. Add some powder. Note the temperature change. Keeping the water amount constant, add a different amount of the same powder and note the final temperature. Keep adjusting only the powder amount until you have discovered how it affects the solution temperature. What relationship did you discover between the amount of powder used and the change in temperature?
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For the first controlled experiment, decide how much water you want to use. Add some powder. Note th...
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