Laws of thermodynamics

waves. The waves hold energy away from releasing object. For a normal temperature, the radiation is in the infrared region of the electromagnetic spectrum. The relationship ,conducting the net radiation from a hot object is called,” Stefan Boltzmann Law.”In 1879, it empirically obtained by Josef Stefan. In 1884, it was obtained theoretically…

most difficult topics to understand in thermodynamics for many students. Students can learn and understand, difficult and abstract concepts better if they are able to see these concepts, in for example, with a simulation. So, in an attempt to better understand the concept entropy and reversibility along with irreversibility of a closed system, we conducted a simulation of an irreversible process of several types of mixing with different substances at different temperatures. This simulation will…

stress, strain and displacement with temperature field and investigates the interaction on the basis of the thermodynamics of the irreversible processes. It relates two separate and independently developed sciences: the theory of elasticity and the theory of heat conduction. The two basic branches of elasticity, namely elastostatic and elastodynamics are developed under different thermodynamic assumptions. The problems of static are regarded as isothermal and those of dynamics are said to be…

The goal of this lab was to determine the heat of fusion of ice (or water). According to Chem.Libretexts.org, Heat of fusion is where solids are heated to a specific heat capacity (The number of heat units needed to raise the temperature by 1 degrees) in order to break the bonds that are keeping them attached, which is called the attractive force. This lab also dealt with the concept of the direction in which a temperature follow. According to chemistryexplained.com, temperature is the measure…

The thermodynamic performance analysis of SAH with and without storage unit were conducted at Madurai City in India on two consecutive sunny days of May 29 and 30, 2015. Both the SAHs were fabricated with similar dimensions and simultaneously tested in the same location. The tests were carried out during the sunshine hours, from 10:00 AM to 06:00 PM IST. Both the collectors were inclined at an angle of 13$degree$, facing south side according to the geographic location of Madurai. The inlet…

reaction 3, which was between HCl and NH_3, the enthalpy of the reaction was -46.2 kJ/mol. The enthalpy of reaction 3 determined by Hess’s Law and the results of reactions 1 and 2 was -37 kJ/mol. The percent error for the enthalpy of reaction 3 acquired from the in-lab procedure was 13%. The percent error for the enthalpy of reaction 3 acquired using Hess’s Law was 30%. One significant correlation between all of the enthalpies calculated is that all of them are negative, showing that heat was…

Gillooly (2006) introduced a biophysical model based on the allometric scaling laws as well as the growth rates of many dinosaurs to predict that as mass increased, so did body temperature. This model indicated that dinosaurs were ectotherms and some of the largest sauropods had body temperatures of over 40°C. Through the use of…

Thermodynamics of Cheetos Purpose: to analyze the caloric content of snack foods, by determining the calories of heat given off by a Cheeto, or other snack foods, as it burns. Procedure: The food sample (Cheeto) was placed on a food holder, and the initial combined mass of the food holder and the Cheeto was measured and recorded. Using a graduated cylinder, 50-100 milliliters (ml) of water was measured and added to an empty soda can that was cut in half and cleaned. The soda can was…

First law efficiency of Braysson cycle and Brayton cycle at temperature ratio 3.0 varying with pressure ratio is analyzed by fig.1.The efficiency of Braysson cycle is greater than Brayton cycle because in Braysson cycle utilizing the hot exhaust gasses from Brayton cycle are expanded in bottom cycle (Ericsson cycle). The first law efficiency of cycle with methane as working fluid is having high efficiency compared to all other working fluids. Since first law efficiency is a function…

Determination of Enthalpy and Entropy Changes of the Thermal Decomposition of Sodium Sulphate Decahydrate Abstract Sodium sulphate decahydrate thermally decomposes to anhydrous sodium sulphate at 50⁰ C and cools to form anhydrous sodium sulphate. Using Hess's Law the enthalpy and entropy changes of this process can be determined in order to deduce the spontaneity of the reaction. The transition temperature was determined by melting the hydrated crystals at 50⁰ C and allowing them to cool until…