Mechanics Thermodynamics I: Caloric theory, latent heat, and the First Law of Thermodynamics by Zachary Hartman, Ph.D., Anthony Carpi, Ph.D. Reading Quiz Teach with this 1. What is the definition of thermodynamics? The energy available to do work. The study of the relationship between heat, work, and energy. The amount of heat it takes to move an engine. The movement of heat. 2. What was the name of the prevailing theory of heat prior to thermodynamics? Heat Equals Work Theory Kinetic Theory Caloric Theory Heat Power Theory 3. Which of the following provides evidence against the caloric theory of heat? Heat does not flow from hot objects to cold objects as predicted by caloric theory. Adding more heat to ice water does not raise the temperature as predicted by caloric theory. Steam engines do not run efficiently when they are cold. In a steam engine, heat flows from the hot parts of the engine to the cool parts. 4. What breakthrough is said to mark the true beginning of the field of thermodynamics? The discovery of a substance called “caloric.” The invention of the thermometer. The discovery of latent heat. The invention of the electric motor. 5. What is latent heat? Heat that doesn’t move from high temperature to low temperature, also known as “lazy heat.” The heat required to move an object from its “latent” position. The heat required to convert the state of matter of a substance without changing its temperature. Heat that does not move unless acted upon by an outside source. 6. Which statement is true about the First Law of Thermodynamics? It states that energy cannot be created. It states that energy cannot be destroyed. It is another name for the Law of Conservation of Energy. All choices are correct. 7. Why was the invention of the calorimeter important? It was the first device invented to measure temperature. It allowed scientists to measure changes in temperature inside of a container without outside influences. It proved that the substance known as” caloric” existed. It provided a reverse process in which cold objects could warm up hotter objects. 8. Which is a true statement about energy conversion? One form of energy cannot be converted into another form of energy. Heat can be converted other forms of energy only if caloric is present. There is no relationship between heat and work. Heat can be converted into other forms of energy. 9. Which is true according to Rudolf Clausius’s 1850 treatise on work and heat? The more work that is done, the less heat is used up. The more work that is done, the more heat is consumed. Heat and work are not related to each other. Heat and work are related only when caloric is present. Score Quiz
