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What two processes need heat to happen?
Melting, where a solid changes to a liquid state, and vaporization, where a liquid changes to a gas state, are two processes that require heat to happen. These phase changes involve absorbing thermal energy to break intermolecular forces holding the particles together.
What two changes of state take place during distillation?
The two changes of state involved in freeze drying are melting and freezing.
What are two examples of changes in state that will generate an increase in molecular motion?
Melting ice to form liquid water or boiling liquid water to produce steam are two examples of changes in state that lead to an increase in molecular motion. In both cases, the added energy causes the molecules to move more rapidly and with greater freedom.
Physical and chemical changes can be either exothermic or endothermic changes?
The two terms are probably used most often to describe chemical reactions - whether or not they absorb or require heat (endothermic) or create release heat (exothermic). However, since the terms simply mean "absorbing heat", and "giving off heat", they can be used to describe any such event, physical, chemical or nulear. Ray
What are the two main uses of ATP?
-> store and release energy -> Transfer energy all in a cell
Identify to changes of state that require energy to be used and two changes of state that require the release of energy?
Changes of state that require energy: melting (solid to liquid) and vaporization (liquid to gas). Changes of state that release energy: freezing (liquid to solid) and condensation (gas to liquid).
What are two changes in state that require the release of latent potential energy?
Two changes in state that require the release of latent potential energy are condensation, where gas turns into liquid and releases energy, and freezing, where liquid turns into solid and releases energy.
What are two changes in state the require the addition of latent potential energy?
Two changes in state that require the addition of latent potential energy are melting and vaporization. When a solid melts into a liquid or a liquid vaporizes into a gas, energy is absorbed to overcome intermolecular forces and change the state of the substance without changing its temperature.
What are two changes of state for water that cause latent heat to be released?
When water vapor condenses into liquid water, latent heat is released. Similarly, when liquid water freezes into ice, latent heat is also released. These changes of state involve the release of latent heat because energy is being released as the water molecules transition to a lower energy state.
When matter changes state what two things are always conserved?
When matter changes state, the amount of mass and the amount of energy are always conserved. This means that the total mass and energy of the system remain constant throughout the phase change.
What does the atom do when an electron in an atom goes from a higher energy state to a lower energy state?
When an electron in an atom moves from a higher energy state to a lower energy state, it releases a photon of light with energy equal to the energy difference between the two states. This process is known as emission of light or photon emission.
A fog forms over a lake. What two changes of state must occur to produce the fog Do the water molecules absorb or release energy during these changes of state?
First, water must evaporate from the lake. The water molecules absorb energy during evaporation. The water vapour in the air must condense to form the tiny water droplets that make up the fog. During condensation the water molecules release energy.
What two kinds of energy changes can take place during a chemical reaction?
Two types of energy changes that can occur in a chemical reaction are (1) endothermic and (2) exothermic. Endothermic is where energy is added to the system and exothermic is where energy is given off by the system.
What two processes need heat to happen?
Melting, where a solid changes to a liquid state, and vaporization, where a liquid changes to a gas state, are two processes that require heat to happen. These phase changes involve absorbing thermal energy to break intermolecular forces holding the particles together.
What two changes of state take place during distillation?
The two changes of state involved in freeze drying are melting and freezing.
What two conditions can change the state of matter?
1) melting-solid state changes into liquid state and 2)freezing-liquid state changes into solid state
What are two examples of changes in state that will generate an increase in molecular motion?
Melting ice to form liquid water or boiling liquid water to produce steam are two examples of changes in state that lead to an increase in molecular motion. In both cases, the added energy causes the molecules to move more rapidly and with greater freedom.
