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Is energy only transferred by heating if there is no temperature difference?
No, energy can still be transferred by heating even when there is a temperature difference. Heat will flow from the object or system with higher temperature to the one with lower temperature until thermal equilibrium is reached. The temperature difference determines the direction and rate of heat transfer.
Why is latent heat called hidden heat?
The latent heat of fusion refers to the heat of fusion in reactions that involve a solid that forms a liquid, or vice versa. The latent heat of vaporization is the latent heat involving a liquid that forms a gas or vice versa.Latent means hidden or unseen. In this context, the 'latent' heat is the heat that is not detectable as a temperature change in the substance. Rather than adding kinetic energy (which is detectable as a temperature change) some heat is required to break the bonds of the solid structure.
When heat flows from one substance to another what happens to the temperature of the substance receiving the heat?
If heat leaves a substance, it becomes colder (temperature falls) and when heat enters it becomes warmer (temperature climbs). Note that, because of entropy, heat will only go from warm to cold things.
Why can heat not be transferred in this way in an iron rod?
heat is transferred only from high energetic concentration to low energetic concentration. therefore heat cant be transferred in any usual way.
Can a sensible heat and latent heat transfers be read with a thermometer?
yes
Is energy only transferred by heating if there is no temperature difference?
No, energy can still be transferred by heating even when there is a temperature difference. Heat will flow from the object or system with higher temperature to the one with lower temperature until thermal equilibrium is reached. The temperature difference determines the direction and rate of heat transfer.
What is the name for thermal energy that is transfered only from a higher temperature to a lower temperature?
The name for the thermal energy transferred only from a higher temperature to a lower temperature is heat. Heat naturally flows from a region of higher temperature to a region of lower temperature until thermal equilibrium is reached.
Why is latent heat called hidden heat?
The latent heat of fusion refers to the heat of fusion in reactions that involve a solid that forms a liquid, or vice versa. The latent heat of vaporization is the latent heat involving a liquid that forms a gas or vice versa.Latent means hidden or unseen. In this context, the 'latent' heat is the heat that is not detectable as a temperature change in the substance. Rather than adding kinetic energy (which is detectable as a temperature change) some heat is required to break the bonds of the solid structure.
What requires less heat to change its temperature than do most other common liquids?
Water requires less heat to change its temperature compared to most other common liquids. This is due to its high specific heat capacity, which means it can absorb or release a significant amount of heat with only a small change in temperature.
How does a greater change in temperature relate to a higher evaporation rate?
Yes, but only if the change is an increase; more heat = faster evaporation.
Why does your temperature gauge rise and lower only when you have the heat on?
Why does your temperature gauge rise and lower only when you have the heat on?
The substance that would absorb the most heat energy with the least temperature change would be one kilogram of?
Water has a high specific heat capacity, meaning it can absorb a large amount of heat energy while experiencing only a small temperature change. Therefore, one kilogram of water would absorb the most heat energy with the least temperature change compared to other substances.
When heat flows from one substance to another what happens to the temperature of the substance receiving the heat?
If heat leaves a substance, it becomes colder (temperature falls) and when heat enters it becomes warmer (temperature climbs). Note that, because of entropy, heat will only go from warm to cold things.
Does the temperature of an object change while a change in its state of matter is occurring?
Yes, the temperature of an object remains constant during a change in its state of matter, such as melting or boiling. During these phase changes, energy is absorbed or released as latent heat, which facilitates the transition between states without altering the temperature. Only once the phase change is complete does the temperature begin to change again as heat is added or removed.
How does heat change a material and can it change back?
Heat raises the temperature of the material. If the change is small then there is only a physical change and allowing the material to return to its original temperature will return it to its original physical state.However, too much heat can result in chemical changes which are usually not reversible. For example, if you heat a piece of plastic enough it will crumple into a charred mass. That charred mass will not return to the pristine plastic.
Why can heat not be transferred in this way in an iron rod?
heat is transferred only from high energetic concentration to low energetic concentration. therefore heat cant be transferred in any usual way.
Equation to calculate heat gained or lost by an object?
c = Q / (m(change in temperature)) Where, c = specific heat capacity Q = amount of heat needed m = mass Change in temperature = initial temperature - temperature(after) Take note that this equation cannot be used in calculating the change in state - melting and boiling Because temperature do not change. We therefore use: Q = lv x m Where, lv = latent heat of vapourisation (for boiling/condensation ONLY) m = mass Q = lf x m Where, lf = latent heat of fusion (for melting/freezing ONLY)
