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When a sample of liquid boils thermal energy increases or decreases?
When a sample of liquid boils, thermal energy increases. This added thermal energy allows the molecules to overcome intermolecular forces and transition from the liquid phase to the gas phase. As a result, the temperature of the liquid remains constant during the boiling process, even though energy is being supplied.
Would a calculation of the atomic mass of a metal be too high or too low if your hot metal sample cooled off while being transferred to the calorimeter?
If the metal sample cooled off during transfer to the calorimeter, the atomic mass calculation would likely be too low. The cooling of the sample might cause a loss of energy, leading to a lower measured heat capacity and an underestimation of the atomic mass.
Why don't particles stop moving?
particles move because when they do not the attraction of a particle and another stops making the particle theory wrong particles are always moving it what makes the attraction stronger
A sample of liquid mercury is heated from 20 and degC to 40 and degC. Which measurement of the sample will increase during this process?
As the liquid mercury is heated from 20°C to 40°C, its temperature will increase. Consequently, the volume of the mercury will also increase due to thermal expansion, as most liquids expand when heated. However, the mass of the mercury will remain constant throughout this heating process.
Which best describes the total mass of a sample of water when it condenses from a liquid to a gas?
The total mass of a sample of water remains constant when it condenses from a liquid to a gas, according to the law of conservation of mass. Although the water changes state, transitioning from liquid to gas involves energy changes rather than mass loss. Therefore, the mass before and after the phase change is the same.
What type of energy is associated with random motion of particles in sample of gas?
thermal energy or kenetic energy
What happens to the thermal energy of a substance as its temperature increases?
As the temperature of a substance increases, its thermal energy also increases. This leads to greater kinetic energy of the particles within the substance, causing them to move faster and creating more thermal energy.
What happens to a sample of matter when its particles lose kinetic energy?
A loss of kinetic energy in the atoms or molecules of a sample of matter will result in the cooling of the sample. That sample will get colder as remove thermal energy from it. The atoms/molecules of a substance have kinetic energy associated with them. This kinetic energy is the result of atomic and/or molecular motion. As a sample of matter cools, the atoms and/or molecules will lose mobility. Loss of mobility and vibrational energy, which are forms of kinetic energy, will become apparent when thermal energy is removed from the sample.
Condensation is an important phase change that commonly occurs in the atmosphere. suppose a 1-m3 sample of air at sea-level pressure containing 4 g of water vapor was cooled such that all 4 g condense?
The 4 g of water vapor in the 1 m3 sample of air will condense into liquid water when cooled. This phase change releases latent heat energy to the surroundings. The final state will be a mixture of dry air and liquid water in equilibrium.
Which type of energy would exist in a liquid sample but not in a gas sample of the same molecular compound?
You think probable to intermolecular forces.
What is the principle of differential thermal analysis?
Differential thermal analysis (DTA) is a thermal analysis technique that measures the temperature difference between a sample and a reference material as they are heated or cooled. The principle relies on detecting changes in thermal properties, such as phase transitions, crystallization, or chemical reactions, which manifest as temperature differences. These differences are recorded and plotted against temperature, providing insights into the thermal behavior and stability of the sample. DTA is commonly used in materials science, chemistry, and pharmaceuticals to study thermal characteristics and material properties.
Why can the temperature of a substance remain the same even if the substance is absorbing thermal energy?
That can't happen, unless the object is losing thermal energy out the back doorat the same rate as it's absorbing thermal energy in front where you're watching.There's no getting around the rules:More thermal energy inside = higher temperature.Less thermal energy inside = lower temperature.Excuse me, I just thought of the exception ... that's when the substance is changingstate, between solid / liquid / gas.The reason is that, for example, it takes more thermal energy for the moleculesof water to act like a liquid than it takes for them to act like a solid, even thoughthe water and the ice are both at the same temperature.Holy moley ! There's another one. If you pump thermal energy into a sample ofgas AND let the gas expand at the same time, you can adjust things so thatthe temperature remains constant.
What term refers to the total kinetic energy of the particles in a material?
Thermal energy is the term for total kinetic energy in a substance, according to a 5th grade science book. There may be other forms of energy in a substance, but thermal energy is the total kinetic energy.Temperature is a measure of the average kinetic energy of the particles in a sample.
If you were able to measure the motion of all particles of a sample and you used you would actually e measuringedthis data to find the average?
Using this data, you could calculate the average kinetic energy of the particles in the sample. Kinetic energy is directly related to motion and is determined by the mass and velocity of the particles. By finding the average kinetic energy, you can understand the overall thermal energy of the sample.
How does differential scanning calorimetry work to measure the heat flow in a sample during temperature changes?
Differential scanning calorimetry (DSC) measures the heat flow in a sample as its temperature changes. It does this by comparing the heat flow in the sample to a reference material as both are heated or cooled at the same rate. The difference in heat flow between the sample and the reference material is used to determine the changes in the sample's thermal properties.
What type of energy is associated with random motion of particles in a sample of gas?
The random motion of particles in a gas is associated with kinetic energy. This energy corresponds to the particles' motion and is dependent on their velocity and mass.
Compared to the particles in a hardened lava sample the particles in a liquid lava sample?
The particles in a hardened lava sample will be solidified and compacted, while the particles in a liquid lava sample will be molten and in a flowing state. The hardened lava particles will have a crystalline structure, whereas the liquid lava particles will lack a fixed arrangement due to their high temperature.
