The word thermodynamics is derived from the Greek words therme, meaning heat and dunamis, meaning power. Thermodynamics is a branch of physics that studies the effects of changes in temperature, pressure, and volume on systems at the macroscopic scale by studying the motion of their particles. A system is the subject of study. Heat means energy in transit and dynamics relates to movement of particles; thus, in essence thermodynamics studies the movement of energy and how energy instills movement. Thermodynamics describes how systems respond to changes in their surroundings. This can be applied to a wide variety of topics in science (physics and chemistry) and engineering, such as engines, phase transitions of matter, chemical reactions, and transportation.
The study of thermodynamics is separated into two branches: the classical and the statistical thermodynamics.
Classical thermodynamics was the original study of thermodynamics in early 1800s. It was concerned with thermodynamic states, and properties as energy, work, and heat, and with the two laws of thermodynamics. However, classical thermodynamics lacked an atomic interpretation of the processes. Classical thermodynamics derives from the research done by physicist Robert Boyle. He developed the concept that the pressure P of a given quantity of gas varies inversely to its volume V at constant temperature. In other words this equation was derived: PV = k, a constant. From here, the thermo-science began to develop with the construction of the first successful atmospheric steam engines.
The first and second laws of thermodynamics emerged simultaneously in the 1850s.
With the development of atomic and molecular theories in the late 19th century, thermodynamics was given a molecular interpretation, which the classical thermodynamics lacked. This field is called statistical thermodynamics, which can be thought of as a bridge between macroscopic and microscopic properties of systems. Statistical thermodynamics is focused around the macroscopic results. The statistical approach is to derive all macroscopic properties (temperature, volume, pressure, energy, entropy, etc.) from the properties of moving particles and the interactions between them in the given system. Statistical thermodynamics was found to be very accurate and successful; therefore it is widely used by scientists around the world.
Thermodynamics is a branch of physics which deals with the energy and work of a system. It was born in the 19th century as scientists were first discovering how to build and operate steam engines. The term thermodynamics was first used by James Joule to express the relationship between heat and power.
The history of thermodynamics begins with a German scientist who designed and built the first vacuum pump.
Thermodynamics is essentially how heat energy transfers from one substance to another. In “Joe Science vs. the Water Heater,” the temperature of water in a water heater must be found without measuring the water directly from the water heater. This problem was translated to the lab by providing heated water, fish bowl thermometers, styrofoam cups, and all other instruments found in the lab. The thermometer only reaches 45 degrees celsius; therefore, thermodynamic equations need to be applied in order to find the original temperature of the hot water. We also had access to deionized water that was approximately room temperature.
Hess’s Law is also an important concept in this lab. It states that the enthalpy of a reaction is independent of the steps it takes to go from reactant to a product. It happens because enthalpy is a state function. A state function depends on the initial and final state but not the actual process. The Hess’s Law is used to calculate the heat formation of Magnesium Oxide. The amount of heat necessary to create one more mole of a substance is called the Enthalpy of Formation.
When there is a heat exchange between two objects, the object’s temperature will change. The rate at which this change will occur happens according to Newton’s Law of heating and cooling. This law states the rate of temperature change is directly proportional between the two objects. The data in this lab will exhibit that an object will stay in a state of temperature equilibrium, unless the object comes in contact with another object of a different temperature. Newton’s Law of Heat and Cooling can be understood by using this formula:
Entropy is not a difficult concept to just take at face value, but it is a difficult topic to gain a good understanding of. To do this some background must be given such as the first and second law of thermodynamics. The second law of thermodynamics states that any event that occurs spontaneously must result in an increase in the randomness of lhe syslem. This means that as an ice cube melts the water molecules that it is composed of will progress toward a less ordered arrangement. The leaves that fall from the trees do nol arrange themselves in a pile on the ground because the second law of thermodynamics is against it. Entropy is a concept that most high school chemistry and physics students enjoy learning about because the now have an excuse for having a messy room, they are fighting nature.
The Boltzmann equation provides a connection between the Newton equations and the spatiotemporal evolution of the macroscopic properties of a gas. In other words, the Boltzmann equation lies in between the two cases described above.
Although Black’s discovery of carbon dioxide was said to lay the foundation for modern chemistry, it wasn’t the only discovery he is credited for. He was the first to conclude that heat and temperature were two different things. Black used water as a universal substance to show that heat is energy, in which may be transported through moving and colliding molecules and the idea that temperature is the measurement of the average motion or kinetic energy of the molecules. He demonstrated this with a bucket of ice monitored by temperature constantly. The ice continually melted, but the temperature remained constant. Black is also well known for his discovery of latent heat, the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature. Latent heat was con be expressed in two ways: the heat can be absorbed if the change involves solid to liquid or liquid to gas or the heat can be released if the change involves gas to liquid or liquid to solid. Black took this idea and developed “specific heat”, in which is defined as the measured amount of heat required to raise the temperature of a substance by a specified number of degrees.
Quantum Mechanics is a branch of physics that describes the structure and behavior of matter.
The first law of thermodynamics simply states that heat is a form of energy and heat energy cannot be created nor destroyed. In this lab we were measuring the change in temperature and how it affected the enthalpy of the reaction.
John Dalton John Dalton, born 6th September 1766, is known for developing the theory of the elements and compounds, atomic mass and weights and his research in colour blindness. He was born in Eaglesfield, Cumberland (now known as Cumbria). In school he was so successful that at the age of 12 he became a teacher. In 1785 he became one of the principles and in 1787 he made a journal that was later made into a book, describing his thoughts on mixtures of gases and how each gas acted independently and the mixtures pressure (which is the same as the gases volume if it had one). Therefore, the law of partial pressure was made.
...eas that had been around for a long time but had also been thought to be different. He put together the concept of mass and the concept of energy and showed that they are actually the same thing when you think about them correctly. So his equation, E = mc2, theE is for energy and the m is for mass, and he showed that given a certain amount of mass you could calculate the amount of energy it contains. Or, alternatively, given an amount of energy, you can determine how much mass you can create from it. So mass and energy, he showed, are the ultimate convertible currencies. They are different carriers of some fundamental stuff that you can call energy, with mass simply being one manifestation of energy. But there are other manifestations: heat and light, radiation, and so forth. These are now recognized to all be different facets of one idea, one entity called energy.
Finding Out Which Fuel Releases the Most Energy Per Gram. Aim: To be able to Find out which fuel releases the most energy per gram. Scientific Theory: What is the Science of Heat is the transfer of energy between two objects due to a temperature. The sand is a sand.
Thermodynamics is the branch of science concerned with the nature of heat and its conversion to any form of energy. In thermodynamics, both the thermodynamic system and its environment are considered. A thermodynamic system, in general, is defined by its volume, pressure, temperature, and chemical make-up. In general, the environment will contain heat sources with unlimited heat capacity allowing it to give and receive heat without changing its temperature. Whenever the conditions change, the thermodynamic system will respond by changing its state; the temperature, volume, pressure, or chemical make-up will adjust accordingly in order to reach its original state of equilibrium. There are three laws of thermodynamics in which the changing system can follow in order to return to equilibrium.
Heat is thermal energy being transferred from one place to another, because of temperature changes. This can take place by three processes. These three processes are known as conduction, convection, and radiation.
Quantitative measurements on gases were first made in a rational manner by the English chemist Robert Boyle (1627 - 1691). The instruments used by Boyle to measure pressure were two: the manometer, which measures differences in pressure, and the barometer, which measures the total pressure of the atmosphere.
Throughout Thomson’s life he made many contributions to science. These include discoveries in thermodynamics and the age of the Earth, as well as innovating the Transatlantic Cable and inventing a tide meter. After exploring thermodynamics for some time, he developed the second law of thermodynamics. This law states that there cannot be a reaction that is completely efficient; a portion of the energy is lost to heat in each reaction. It also says that heat flows to areas that...