Thermodynamics

THERMODYNAMICS PROJECT Prof: Srinivasan G. Srivilliputhur Thermodynamics of Solidification. - Finally Draft - Chun-Yu Lin and Yiyang Wan University of North Texas Material Science and Engineering department Denton, TX 76207 Oct 30 2014 Outline 1. Introduction of Solidification 2. Principle of Solidification Process a. Nucleation b. Growth of solid c. Alloy’s phase diagram d. Alloy Solidification 3. Real Application of Solidification Process a. Eutectic Solidification Process

Thermodynamics- Enthalpy of Reaction and Hess’s Law Objectives: 1. To calculate the heat of reaction of a given reaction using the concepts derived from Hess’s Law. Pre-lab Questions: 1. Define Heat of Reaction. The enthalpy change associated with the completion of a chemical reaction. 2. Define Specific Heat. The energy it takes to raise the temperature of 1 gram of a substance by one degree Celsius. 3. Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct

Thermodynamics Paper: Thermodynamics of mixing of poly(vinyl chloride) and poly(ethylene-co-vinyl acetate) Introduction The mixing of poly(vinyl chloride) (PVC) and poly(ethylene-co-vinyl acetate) (EVA) is investigated for its thermodynamic properties such as enthalpy of mixing and glass transition temperature. Both the two pure polymers and the mixtures are investigated in terms of specific heat as well. The mixing of PVC and EVA are investigated because of the possible use of EVA as a plasticizer

with it, and thermodynamics is no exception. In everyday life, everything uses energy, but does that mean the energy is lost? Of that energy that is being used, what is the quality of that energy and is it increasing or decreasing? Through thermodynamics, these types of question can be solved using the different laws. Thermodynamics can be defined as the science of energy. The name thermodynamics is derived from the Greek words therme, meaning heat and dynamis, meaning power. Thermodynamics is at work

The four fundamental laws of thermodynamics are used to define how physical quantities behave under various circumstances, these include energy, entropy, and temperature. The First Law of Thermodynamics states that energy in the universe is always conserved, therefore it cannot be created or destroyed, and it can only be transformed from one form to another. The second law of thermodynamics states that entropy of isolated systems always increases, this means that in all processes of energy exchange

First Law-Exercise: Problem 1: A volume 10 m3 contains 8 kg of oxygen at a temperature of 300 K. Find the work necessary to decrease the volume to 5 m3, (a) at a constant pressure and (b) at constant temperature. (c) What is the temperature at the end of the process in (a)? (d) What is the pressure at the end of process in (b)? (e) Show both processes in the p-V plane. Problem 2: The temperature of an ideal gas at an initial pressure p1 and volume V1 is increased at constant volume until the pressure

Heidi Duncan 11/24/13 Exothermic and Endothermic Reactions Lab The purpose of this lab is to observe how heat is released or absorbed with different chemicals. Data Table 1 – HCI and NaOH Trial 1 Trial 2 Avg Volume 1.0 M HCI(ml) 25 25 - Volume1.0 M NaOH (ml) 25 25 - Ti of HCI before mixing 20 20 - Ti of NaOH before mixing( 20 20 - Average Ti before mixing( 20 20 - Tf of mixture ) 26 26 - T ) 6 6 - Specific Heat (J/g) 4.184 4.184 - Heat, q (J) 1255.2

Maxwell’s Demon is a thought experiment created by a mathematician James Clerk Maxwell to contradict the second law of thermodynamics. For example, you have a box filled with a gas (a mixture of hot and cold molecules) at the same temperature. This means that the temperature can have an affect on an average speed of the molecules. Some of the molecules will move slower than average, and some will move faster than the average. Suppose that a divider is placed in the middle of the box separating the

1. Explain the consequences of the first and second laws of thermodynamics for living systems. The first law of thermodynamics states that all energy is constant, which as a consequence, or result, means that energy can never be produced or destroyed but rather it is transformed. During the process of energy being transformed some energy is typically lost as heat. Another result of energy being transformed is the increase of entropy, or disorder. The increase of entropy and loss of energy

Thermodynamic Investigation of the Joule-Thompson Effect and Coefficient Determination for Helium and Carbon Dioxide Niki Spadaro, Megan Cheney, and Jake Lambeth University of North Florida, CHM4410C Fall 2010 The Joule-Thomson coefficient explains the behavior of any real gas when changes in intensive properties, such as temperature and pressure, occur. The coefficients for helium and carbon dioxide were determined using a Joule-Thomson apparatus that created constant enthalpy within the