What happens to the internal energy and temperature of a system when mechanical work is done on it?
Thus, whenever work is being done on the system, the internal energy represented by you that increases. So basically the change in internal energy that will be positive and as the internal energy is a function of temperature and the internal energy increases when the work is being done on the system.
What are the three processes that occur in every heat engine quizlet?
Heat flows from hot to cold. What three processes occur in every heat engine? When heat is added, energy flows from hot to cold, and when work is done. What is thermal pollution?
What is the adiabatic form of the first law of thermodynamics quizlet?
What is the adiabatic form of the first law? It is "Air temperature rises or falls as the pressure increases or decreases.
When air is quickly compressed why does its temperature increase?
The air's temperature increased when quickly compressed because work was done on the air so its internal energy increased causing an increase in temperature.
What happens to the temperature when the heat is applied what does it suggest about the internal energy of the system?
When a system absorbs or loses heat, the average kinetic energy of the molecules will change. Thus, heat transfer results in a change in the system's temperature as long as the system is not undergoing a phase change.
How does the increase in temperature affect the internal energy of a system?
When the temperature of a system increases, the kinetic and potential energies of the atoms and molecules in the system increase. Thus, the internal energy of the system increases, which means that the enthalpy of the system increases – this is true under constant pressure or constant volume.
What happens to the internal energy of an insulated system when mechanical work is done on it what happens to its temperature assuming no change of phase occurs?
What happens to the internal energy of an insulated system when mechanical work is done on it? What happens to its temperature assuming no change of phase occurs? Both increase. What condition is necessary for a process to be adiabatic?
How does the law of conservation of energy relate to the first law of thermodynamics?
The first law of thermodynamics is equivalent to the law of conservation of energy: energy cannot be created or destroyed; the total amount of energy in the Universe is fixed. Energy can be transformed from one form to another or transferred from one place to another but the total energy must remain unchanged.
Could you cool a kitchen by leaving the refrigerator door open and closing the kitchen door and windows explain quizlet?
However, you cannot cool the kitchen by having the refrigerator door open. The refrigerator exhausts more heat than it removes from the refrigerated volume, so the room actually gets warmer with the refrigerator door open.
What happens when an ideal gas is subjected to an adiabatic process?
When an ideal gas is compressed adiabatically (Q=0), work is done on it and its temperature increases; in an adiabatic expansion, the gas does work and its temperature drops.
Why does temperature drop when pressure drops?
Because there is less mass in the can with a constant volume, the pressure will decrease. This pressure decrease in the can results in a temperature decrease.
What happens to the temperature of air when it is compressed?
The combination law explains what happens to air when it's compressed into a smaller volume. It tells us that when air is compressed, the air's pressure and temperature increase as the volume of the space containing air decreases. By pushing air into a smaller space, we force it to become hotter and more pressurized.
What happened to the temperature when heat is applied?
As substances are heated, the temperature increases. In other words, as energy is added to a substance, the molecules making up that substance move faster.
What effect does the initial temperature of the water have on the change in temperature of the water after the hot metal is added?
Since some of the energy from the water was transferred to the metal to speed them up, the motion of the water molecules decreases. This causes the temperature of the water to decrease.
What happens when the temperature of a system increases?
On increasing the temperature, the system's entropy increases because the increase in temperature increases the kinetic energy of molecules and so the randomness.
When the temperature of an object increases the internal energy decreases?
The reverse logic applies as well. Energy, once released as heat, results in a decrease in the overall internal energy of the object. Since kinetic energy is one of the forms of internal energy, the release of heat from an object causes a decrease in the average kinetic energy of its particles.
What happens to the internal energy of a system either increases or decreases if work is done a by the system B on the system?
Solution : (a) If work is done on the system internal energy will increase. (b) If work is done by the system, internal energy will decrease.
What law in physics specially thermodynamics talks about the conservation of energy in the system and how can you relate it to the lesson?
This phenomenon of conservation is explained by what we call the first law of thermodynamics, sometimes referred to as the law of energy conservation. The law states energy cannot be created or destroyed.
What is the law of thermodynamics explain why this law means that we can never reduce or recycle high quality energy?
second law of thermodynamics: when energy is converted to another form (physically or chemically), we end up with lower quality or less usable energy than we started with. once high quality energy is used, it degrades to low quality heat and is dispersed into the environment.
Can you warm a kitchen in winter by leaving the oven door open?
It is possible to warm the kitchen in the winter by having the oven door open. The oven heating elements radiate heat energy into the oven cavity, and if the oven door is open, the oven is just heating a bigger volume than usual.
What is meant by a system quizlet physics?
What is meant by a system? a well-defined group of atoms or objects, molecules, particles. ex.)
How does temperature change in adiabatic process?
An adiabatic process has a change in temperature but no heat flow. The isothermal process has no change in temperature but has heat flow.
Why does temperature decrease in adiabatic expansion?
Solution : In an adiabatic expansion, a gas does work at the cost of its kinetic energy and so its random motion is reduced. According to the kinetic theory the temperature of a gas is associated with its random motion. This is why the temperature of a gas drops in an adiabatic expansion.
What happens to temperature when pressure increases?
As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
Does temperature increase as pressure increases?
The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its pressure.
Does temperature increase on compression?
Solution : Sudden compression of a gas is an adiabatic process. The work done in compressing the gas increases the internal energy of the gas. Hence the temperature of the gas rises.
Does temperature increase with pressure?
In a closed system where volume is held constant, there is a direct relationship between Pressure and Temperature. In a direct relationship, one variable follows the same change when it comes to increasing and decreasing. For example, when the pressure increases then the temperature also increases.
What happens to the temperature of air when altitude increases?
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.
What happens when temperature increases in an endothermic reaction?
If the reaction is endothermic as written, an increase in temperature will cause the forward reaction to occur, increasing the amounts of the products and decreasing the amounts of reactants. Lowering the temperature will produce the opposite response. A change of temperature has no effect on an athermal reaction.
When the temperature rises and water starts to boil the molecules gain more energy what do you call this type of energy as they move faster?
thermal energy The movement of thermal energy from a substance at a higher temperature to one at a lower temperature is called heat. When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises.