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What happens to a stars nuclear energy generation change if the core decreases in temperature?
What happens to a stars nuclear energy generation change if the core decreases in temperature?
Most substances are?
Most substances are either solids, liquids, or gases at room temperature, depending on their molecular structure and intermolecular forces. The state of a substance can change with temperature and pressure.
What is the only way the density of a pure substance can change?
The density of a pure substance can change by altering its temperature. As temperature increases, most substances expand and therefore decrease in density, whereas as temperature decreases, most substances contract and increase in density.
What happens to substances in a chemical change?
It creates a new mixture and is irreversible.
A substance that enters into and is altered through a chemical change?
These substances are called reactants.
What happens to substances temperature during a change of state?
Temperature remains constant
What happens When a substance goes through a physical change?
The Substances die
What happens to the physical properties of substances when they are at room temperature?
At room temperature, the physical properties of substances can change. For example, some substances may melt, freeze, evaporate, or condense. These changes can affect properties like color, texture, and state of matter.
What happens to substances as they lose or gain energy?
As substances lose energy, they tend to decrease in temperature and may change state (e.g. solid to liquid). Conversely, as substances gain energy, they tend to increase in temperature and may change state in the opposite direction (e.g. liquid to gas).
What happens to mass when substances go through a chemical change?
The total mass of products is unchanged from the total mass of the reactants, but the masses of particular substances among the reactants or products change.
Reactants?
The Substances before he change happens.
What causes substances to change phases?
The pressure and temperature mostly the temperature.
What type of heat transfer can occur through transparent substances?
Radiation is the primary type of heat transfer that can occur through transparent substances. This is because radiation can pass through transparent materials like glass without significant absorption or change in temperature.
Why do substances exist as gases?
At a given temperature practically all substances become a gas; it is a change of phase.
What happens when you mix two substances?
You get a mixture.
Which substances will show the smallest change in temperature when equal amounts of energy are absorbed?
Substances with high specific heat capacities, such as water, will show the smallest change in temperature when equal amounts of energy are absorbed. This is because these substances can absorb a lot of heat energy without a significant increase in temperature.
Why does a chemical change in temperature indicate that a chemical reaction may have occurred?
A change of temperature implies that some energy has been transfered or used. Since chemical reactions either require or release energy to occur, the environment may change temperature as the substances react.
