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What does a substance do when it is cooled?
When a substance is cooled, its molecules slow down and have less energy, causing them to move closer together. This often results in the substance contracting or becoming more dense. In some cases, cooling a substance may also lead to a change in state, such as from a gas to a liquid or from a liquid to a solid.
When a liquid is cooled the molecules in that liquid?
I assume you mean what happens to the molecules... They slow down due to the loss of kinetic energy when the liquid is cooled. When they are sufficiently cooled as to cause freezing, that's a different story.
What happens to thermal energy in a beaker when it is cooled down?
When a beaker is cooled down, thermal energy is transferred from the beaker to the surroundings. The molecules in the beaker lose kinetic energy, which causes the temperature of the beaker to decrease. This transfer of thermal energy continues until the beaker reaches thermal equilibrium with its surroundings.
The molar enthalpy of vaporization of benzene at its boiling point 353.25 K is 30.8 kJ mol-1 What is the molar internal energy change?
The molar internal energy change can be calculated using the equation: ΔU = ΔH - PΔV, where PΔV is the work done during the phase change. For vaporization, at constant pressure, the work done is approximately zero, so the molar internal energy change is approximately equal to the molar enthalpy of vaporization. Therefore, the molar internal energy change in this case is 30.8 kJ mol-1.
What are the two major characteristics that change when air is heated and cooled?
Since we are talking abut heating and cooling - we define those both as changing the temperature so that is one characteristic. Other characteristics depend on how the heating and cooling occur. If the pressure remains the same, air will expand on heating and contract on cooling. If the volume is held constant, the pressure will increase with heating and decrease with cooling. The internal energy depends on what you do with pressure, work and heat. You can actually get a warmer gas with less internal energy and a cooler gas with more internal energy.
How a change in thermal energy causes matter?
A burning wood fire, when cooled down or extinguished, leaves wood ashes.
When matter is heated or cooled what about its changes?
When matter is heated, its particles gain energy and move faster, leading to expansion or a change in state (e.g., from solid to liquid). When matter is cooled, its particles lose energy and slow down, leading to contraction or a change in state (e.g., from liquid to solid).
When a pure substance is heated or cooled but does not change state the energy as heat is the what?
The energy as heat is being used to increase or decrease the temperature of the pure substance. This process involves changing the internal energy of the substance without causing a phase transition.
Why do some substances change when they are heated or cooled?
When substances are heated or cooled, the energy of their particles changes. Heating causes particles to move faster and increase in energy, which can result in changes such as melting, vaporization, or chemical reactions. Cooling causes particles to slow down and lose energy, leading to changes like freezing or condensation. These processes are due to the rearrangement of particles and their interactions at the molecular level.
Why does soil release more energy when cooled?
When something is cool, it tries to absorb energy from it's surroundings. When something is cooled off, it releases energy during that cooling process.
How do i Calculate the change in thermal energy for a 10 piece of copper if it is cooled from 35 C to 21 C.?
You cannot. You need the mass of the piece of copper.
What does a substance do when it is cooled?
When a substance is cooled, its molecules slow down and have less energy, causing them to move closer together. This often results in the substance contracting or becoming more dense. In some cases, cooling a substance may also lead to a change in state, such as from a gas to a liquid or from a liquid to a solid.
What happens to heat stored in water vapor when it is cooled to its dew point?
When water vapor is cooled to its dew point, the heat energy is released as latent heat, causing the water vapor to condense into liquid water. This latent heat is the energy required for the phase change from gas to liquid, and is released back into the surrounding environment during condensation.
What are the advantages and disadvantages of an air cooled condensers over that of a fan cooled in refrigeration?
The air cooled can be more efficient because they will use less energy. They are difficult to maintain if it stays too hot.
How do you describe the thermal expansion?
Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. Essentially, as a substance is heated, its particles gain energy and move more, causing the material to expand. Conversely, when the substance is cooled, its particles lose energy and move less, resulting in contraction.
When a liquid is cooled the molecules in that liquid?
I assume you mean what happens to the molecules... They slow down due to the loss of kinetic energy when the liquid is cooled. When they are sufficiently cooled as to cause freezing, that's a different story.
How much energy in joules is released when 17 kilograms of granite is cooled from 45 and degC to 21 and degC?
The specific heat capacity of granite is approximately 790 J/kg°C. To find the energy released, you can use the formula Q = mcΔT, where Q is the energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Plugging in the values, the energy released would be (17 kg) * (790 J/kg°C) * (45°C - 21°C).
