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Specific Heat Lab Preparation and Thermodynamics Overview

keagan avatar
keagan
12 diapositives · 269 Views · Aug 11, 2014

This document outlines the agenda for the thermodynamics lab session focused on specific heat. Students will convert the specific heat table from the textbook for practical lab use. The session includes checking homework, reviewing thermodynamics notes, and preparing for an upcoming open-note quiz. Key concepts covered include the three laws of thermodynamics, the significance of entropy, and the principles governing thermal energy transfer. Additionally, the sheet provides essential formulas for calculating equilibrium temperature, aiding students in their lab work.

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  1. ICP Thermodynamics Notes Do Specific Heat Lab 12/12/12

  2. Warmup Fill in this chart to convert the specific heat table in your book (page 485) intosomething we can use for the lab.

  3. Agenda • Check homework • Thermodynamics Notes • Lab • Go over homework • Open note quiz tomorrow!

  4. Open Note Quiz tomorrow: You may use the following four papers on your open-note quiz: • Heat and Temperature Notes (fill-in-the-blank) • Vocabulary Paper from Chpt 14 • Notes with Specific Heat formulas (written on a blank piece of paper) • Thermodynamics Notes (Received today)

  5. What is Thermodynamics? • Thermodynamics –study of the conversions between thermal energy and other energy forms. • “thermo” means heat and “dynamics” means changes, so it is a study in heat changes.

  6. First Law of Thermodynamics • 1st Law –Energy is conserved. • Means if energy is added to a system, it can either increase the thermal energy (heat) or do work on the system.

  7. Second Law of Thermodynamics • 2nd Law –Thermal energy can only flow from hotter objects to colder objects unlesswork is done. • In other words, in order to work against natural heat flow (colder to hotter), work needs to be done.

  8. Entropy • Entropy – the state of disorder in a system. Entropy in the universe is always increasing. In order to decrease the entropy of a system, work must be done.

  9. Third Law of Thermodynamics • 3rd Law –Absolute zero (0 K) cannot be reached. • Absolute zero can only be reached when all energy and matter is randomly distributed across space. • Scientists have come very close though (3 / 1000 000 000 of a degree above 0 K).

  10. Describe the meaning of this cartoon.

  11. Lab Data Sheet (copy this down) Formula: cmo = cwmw(Tf-Tiw) mmo(Tf – Timo)

  12. Part 2 of Worksheet Calculating Equilibrium Temperature: Tf = m1c1T1 + m2c2T2 m1c1 + m2c2 Tf = c1T1 + c2T2 c1 + c2 Use this one if the masses are different. Use this one if the masses are the same. ***The numbers 1 and 2 refer to substance 1 and substance 2.