Question
When sufficient heat is supplied to an ice cube
- It changes state
- Its molecules get tightly packed
- Its molecules stop moving
- None of the above
Hint:
Heat and Temperature. "Heat" is defined as the transfer of energy from the higher temperature object to the lower temperature object. "Temperature" is a measure of the average amount of kinetic energy possessed by the particles of an object.
The correct answer is: It changes state
The answer is choice 1 which is it changes state. The solid state is converted into liquid state.
When heat is applied to an ice molecule, the solid phase changes to the liquid phase and thus the ice is melted into water after applying heat. Heating a substance makes the molecules move faster and thus the heat energy breaks the hydrogen bonds that hold the molecules in the ice together thus resulting in melting of ice.
Related Questions to study
Match the following:
| State | Flow of heat | ||
| a |  |
i | To the hand |
| b |  |
ii | From the hand |
| c |  |
iii | None |
Match the following:
| State | Flow of heat | ||
| a | |
i | To the hand |
| b | |
ii | From the hand |
| c | |
iii | None |
In which of the following states the potential energy is the lowest?
In which of the following states the potential energy is the lowest?
The molecules of which form of water have the lowest kinetic energy?
The molecules of which form of water have the lowest kinetic energy?
The heat energy flows from a _____ to _____ body.
The heat energy flows from a _____ to _____ body.
A pot of water is freezed, what happens at a molecular level?
A pot of water is freezed, what happens at a molecular level?
87 kcal = ____ cal
87 kcal = ____ cal
8373 J = ____ cal
8373 J = ____ cal
2622 cal = ___ kcal
2622 cal = ___ kcal
385 cal =___ J
385 cal =___ J
In which of the following states the potential energy is the highest?
In which of the following states the potential energy is the highest?
How do we know that a substance has changed state from solid to liquid at a molecular level?
How do we know that a substance has changed state from solid to liquid at a molecular level?
Match the following:
| State | Attributes |
| a. Solid | i. Highest kinetic energy of the molecules |
| b. Liquid | ii. Highest potential energy of the molecules |
| c. Gas | iii. Moderate K E and P E |
Match the following:
| State | Attributes |
| a. Solid | i. Highest kinetic energy of the molecules |
| b. Liquid | ii. Highest potential energy of the molecules |
| c. Gas | iii. Moderate K E and P E |
In which of the following physical states the intermolecular space is the highest?
Inter molecular is the force of attraction or repulsion which act between neighboring particles(atoms, ions, molecules). These forces are weak compared to the other , such as covalent or ionic bonds between atoms in a molecule. The order of force of inter molecular attraction: solids > liquids > gases
In which of the following physical states the intermolecular space is the highest?
Inter molecular is the force of attraction or repulsion which act between neighboring particles(atoms, ions, molecules). These forces are weak compared to the other , such as covalent or ionic bonds between atoms in a molecule. The order of force of inter molecular attraction: solids > liquids > gases
What kind of energy is associated with the motion and speed of the particles constituting a substance?
- Matter is composed of tiny particles (atoms, molecules or ions)
- These particles are in constant, random motion and possess kinetic energy.
- The particles also have potential energy due to inter- molecular attractions.
- The average kinetic energy increases as the temperature increases.
- If two particles of different masses are moving at the same speed, the heavier particle will have higher kinetic energy.
- Similarly, for particles of the same mass moving at the different speeds, the faster one will possess the greater kinetic energy.
What kind of energy is associated with the motion and speed of the particles constituting a substance?
- Matter is composed of tiny particles (atoms, molecules or ions)
- These particles are in constant, random motion and possess kinetic energy.
- The particles also have potential energy due to inter- molecular attractions.
- The average kinetic energy increases as the temperature increases.
- If two particles of different masses are moving at the same speed, the heavier particle will have higher kinetic energy.
- Similarly, for particles of the same mass moving at the different speeds, the faster one will possess the greater kinetic energy.
Internal energy = _____ + _______.
The sum of the electronic energy, nuclear energy, chemical bond energy, potential energy and kinetic energy. Internal energy is made up of kinetic energy and potential energy of the constituent particles. The kinetic energy arises due to the motion of its particles like translational energy, rotational energy, vibrational energy etc. The potential energy arises from different types of interaction between the particles, and it includes electronic energy, nuclear energy,energy due to molecular interaction,etc.
The S.I.unit of internal energy is Joule(J).
The C.G.S unit of internal energy is ergs.
Internal energy = _____ + _______.
The sum of the electronic energy, nuclear energy, chemical bond energy, potential energy and kinetic energy. Internal energy is made up of kinetic energy and potential energy of the constituent particles. The kinetic energy arises due to the motion of its particles like translational energy, rotational energy, vibrational energy etc. The potential energy arises from different types of interaction between the particles, and it includes electronic energy, nuclear energy,energy due to molecular interaction,etc.
The S.I.unit of internal energy is Joule(J).
The C.G.S unit of internal energy is ergs.
