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Tracey Armstrong Chantrynce Cage Edward Jones Elijah Williams

Energy and Enthalpy. Tracey Armstrong Chantrynce Cage Edward Jones Elijah Williams. What is Energy?. Energy is the ability to do work or produce heat. It exists in two basic forms potential energy and kinetic energy. potential and kinetic energy.

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Tracey Armstrong Chantrynce Cage Edward Jones Elijah Williams

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  1. Energy and Enthalpy Tracey Armstrong Chantrynce Cage Edward Jones Elijah Williams

  2. What is Energy? • Energy is the ability to do work or produce heat. It exists in two basic forms potential energy and kinetic energy.

  3. potential and kinetic energy • Potential energy is energy due to the composition or position of an object Ex: A downhill skier poised at the starting gate for a race. • Kinetic Energy is energy in the motion of objects and all people around you.

  4. Laws of Energy • States that in any chemical reaction or physical process, energy can be converted from one form to another but it isn’t created nor destroyed, this is also known as the First Law of Thermodynamics.

  5. Kinetic and Potential

  6. Websites http://www.internet4classrooms.com/eoc_chemistry.htm http://classroom.jc-schools.net/sci-units/energy.htm http://www.tipton-county.com/mms/practice%20sites%20for%20TCAP.htm

  7. Enthalpy Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.

  8. Example ProblemGiven: The heat of fusion of ice is 333 J/g (meaning 333 J is absorbed when 1 gram of ice melts). The heat of vaporization of liquid water at 100°C is 2257 J/g.Part a: Calculate the change in enthalpy, ΔH, for these two processes.H2O(s) → H2O(l); ΔH = ?H2O(l) → H2O(g); ΔH = ?Part b: Using the values you just calculated, determine the number of grams of ice that can be melted by 0.800 kJ of heat. Answera.)H2O(s) → H2O(l); ΔH = +6.00 kJH2O(l) → H2O(g); ΔH = +40.7 kJb.) 2.40 g ice melted

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