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What substance can change from a liquid to a gas on its own without energy needing to be added?
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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.
How does the energy of a substance change during an exothermic change?
During an exothermic change, energy is released from the substance in the form of heat to the surroundings. This results in a decrease in the internal energy of the substance, leading to a decrease in its temperature.
What is a good sentence for latent heat?
Latent heat is the energy absorbed or released by a substance during a phase change without a change in temperature.
What is the name of the energy needed to change a substance from a liquid to a gas?
The energy needed to change a substance from a liquid to a gas is called heat of vaporization.
What effects does an energy change have on the idenitity of a substance?
An energy change does not alter the identity of a substance. It may cause a physical change (like melting or boiling) or a chemical change (like reactions), but the substance itself remains the same at the molecular level. The energy change only affects the arrangement or movement of particles within the substance.
Latent heat is the energy required for 1 kg of a substance to change?
Latent heat is the energy required for 1 kg of a substance to change ___________. phase
Why is latent heat considered potential energy?
This is referred to as conservation of energy
What are two examples of change that is not caused by energy and explain?
One example is a phase change, such as ice melting into water, where energy is used to change the state of the substance without altering its temperature. Another example is a chemical reaction where the bonds between atoms are broken and rearranged without a change in energy, resulting in a new substance.
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.
What is the energy required to change a substance from a solid to a liquid WITHOUT changing it's temperature?
magic of coarse!
How can you add thermal energy to a substance without increasing is temperature?
You can add thermal energy to a substance without increasing its temperature by changing its phase, such as melting a solid or vaporizing a liquid. During these phase changes, energy is absorbed to break intermolecular bonds rather than increasing the substance's kinetic energy, resulting in no temperature change.
How does the energy of a substance change during an exothermic change?
During an exothermic change, energy is released from the substance in the form of heat to the surroundings. This results in a decrease in the internal energy of the substance, leading to a decrease in its temperature.
The energy involved in a phase change is called the?
The energy involved in a phase change is called the latent heat. It is the amount of heat energy required to change the phase of a substance without changing its temperature.
What is a good sentence for latent heat?
Latent heat is the energy absorbed or released by a substance during a phase change without a change in temperature.
What is the name of the energy needed to change a substance from a liquid to a gas?
The energy needed to change a substance from a liquid to a gas is called heat of vaporization.
Does the amount of substance change its thermal energy?
No, the amount of substance does not change its thermal energy. Thermal energy is dependent on temperature and the specific heat capacity of the substance, not on the amount of the substance.
When substances are given energy they may change state This is a physical change If they do not receive enough energy to change state they will still experience a physical change What is this call?
This is called a non-phase change physical change. It refers to a change in physical characteristics or properties of a substance without the substance transitioning from one state to another (e.g., melting, freezing).
