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Does heat change all substances?
It depends on what change this is. If this is visible change, it may not be detected. Otherwise, heat does change substances in terms of kinetic energy of molecules in a body or average distance between the molecules of the body.
If 400 J of heat are added to a gas in an isochoric process comma what is the change in its internal energy?
In an isochoric (constant volume) process, there is no change in volume, so the work done is zero. Therefore, all the heat added goes into increasing the internal energy of the system. The change in internal energy of the gas would be equal to the heat added, which in this case is 400 J.
What happens during a phase change as heat is added to a water sample?
As heat is added to a water sample during a phase change, all of that heat goes into changing the phase, say from solid ice, to liquid water, and as a consequence, the TEMPERATURE of the sampleDOES NOT CHANGE.
What happens when heat is added sample of water in an insulated container?
When heat is added to a sample of water in an insulated container, the water's temperature increases as the added energy is absorbed. This energy causes the water molecules to move more rapidly, leading to an increase in thermal energy. If enough heat is added, the water may eventually reach its boiling point, leading to a phase change from liquid to vapor. However, in an insulated container, no heat is lost to the surrounding environment, so all the added heat contributes to increasing the water's temperature or causing a phase change.
What substances undergo physical change?
All substances have physical changes.
What is the relationship between energy and phase changes?
During phase changes, energy is either absorbed or released in the form of heat. This energy is used to break or form intermolecular forces between particles. As a result, temperature remains constant during the phase change until all the substance has transitioned to the new phase.
Are all substances the same before and after burning?
No, some substances change their whole form and others just change their color and shape.
Should heat be added for a chemical reaction to take place?
If the reaction is endothermic in nature then heat should be added to it,otherwise all chemical reaction neddn't heat always.
Why doesnt the temp change at 0 cel even though 80 kcal of heat is added?
At 0 degrees Celsius, added heat is used to break intermolecular forces during the phase change from solid to liquid, not to increase temperature. This energy is known as latent heat of fusion and is needed to overcome the solid's molecular arrangement. Once all the ice has melted, the temperature will start to rise again.
What undergoes physical change?
All substances have physical changes.
Why do substances exist as gases?
At a given temperature practically all substances become a gas; it is a change of phase.
Can phosphorus conduct heat?
Yes, but not very well. All substances can conduct heat, but some are better than others.
