Turn and Talk 1) Is wind cold? 2) What's the difference between heat, energy and temperature? 3) How does it relate to the Unknown Liquids Lab.

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Presentation transcript:

Turn and Talk 1) Is wind cold? 2) What's the difference between heat, energy and temperature? 3) How does it relate to the Unknown Liquids Lab

Feeling the Heat How Does Temperature Relate to Phase Change?

Open your journal to the next clean page… Title the page “Feeling the Heat” Be sure you update your journal… Table of Contents: Feeling the Heat!

Materials (per group) 1 hot plate 1 300mL beaker half full of icewater 1 Stainless Steel temperature probe 1 laptop with LoggerPro Safety Equipment: safety goggles, thermal gloves

This lab incorporates very hot surfaces, boiling liquids, and fragile glassware Absolutely no horseplay! Your safety and the safety of your fellow students depends upon your ability to maintain focus and awareness of risk.

Procedure Outline 1.Put the beaker of ice water on the hotplate. 2.Launch LoggerPro and connect the probe. Change the sample time from 180 seconds to Change the sample rate to 1 per second. Begin sampling and start stirring with the probe. (Keep the probe amongst the ice cubes; don’t touch it to the bottom of the beaker) 1.Turn the hotplate on & set it to 350 ℃ 2.Continue stirring the ice water (taking turns) until all ice is melted. Then you may rest the probe in the beaker as shown at right. (NOT touching the bottom!) 1.Gather data until 5 minutes after it starts boiling. 2.Remove the probe from the water, turn off & unplug the hotplate.

As Your Partner is Stirring... Look up the following terms and illustrate in your journal how they apply to today’s lab: o conduction o convection o radiation Make observations about what is happening in your experiment, gathering qualitative data and noting the elapsed time/ temperature when the observation was made

Data Collection ●Screenshot your final data graph. ●Print half page size copies (2 per page) and enough for your teammates. (B&W please) ●Tape into your journal.

Data Analysis What does the data say? What does it mean? 1.Make several statements from the data. 2.Identify any relationships, patterns, differences. (5 minimum) Be factual! 1.Generate questions from the data and what you observed or experienced. (5 minimum) 2.Offer a logical reason to explain the data. What happened? Why? (Claim - Evidence - Reasoning!)