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Chemistry calorimetry help?
Calorimetry measures the heat of chemical reactions and physical changes. The steps involved in solving calorimetry problems are as follows: The heat of the reaction is less than the amount of heat measured by the calometer. The heat gained by the calometer is the capacity of the calorimeter and temperature change of the sample undergoing the chemical and/or physical change. The combination of the two are calculated to heat reaction and given temperature change.
Is less gasoline that remains in the gas tank as carbon dioxide physical change or chemical change?
The conversion of gasoline to carbon dioxide when it is burned is a chemical change, as it involves the breaking and forming of chemical bonds. This process releases energy in the form of heat and light.
Is candle wax melting exothermic?
Yes, the process of candle wax melting is exothermic because it releases heat energy as the solid wax changes into a liquid state. The energy required to break the bonds holding the wax molecules together is less than the energy released when the molecules reorganize into a more disordered liquid state.
Is ice cream melting a chemical or physical change and does it involve a change in matter?
Ice cream melting is a physical change because it is a change in state from solid to liquid without altering the chemical composition of the ice cream. The process involves a change in the arrangement and spacing of the ice cream molecules as they gain energy and transition to a less ordered state.
When a catalyst is present is more or less activation energy needed to start a chemical reaction?
When a catalyst is present, less activation energy is needed to start a chemical reaction. This is because the catalyst provides an alternative pathway for the reaction to occur, allowing it to proceed more readily. The catalyst achieves this by lowering the activation energy barrier for the reaction.
What are the best ways to save energy?
Energy cannot be saved.!!!! However, physical or chemical sources can release more or less energy as appropriate. This release is then transferred ( the energy) to another form/source.
Chemistry calorimetry help?
Calorimetry measures the heat of chemical reactions and physical changes. The steps involved in solving calorimetry problems are as follows: The heat of the reaction is less than the amount of heat measured by the calometer. The heat gained by the calometer is the capacity of the calorimeter and temperature change of the sample undergoing the chemical and/or physical change. The combination of the two are calculated to heat reaction and given temperature change.
Is titanium less dense than iron a chemical change?
No, the difference in density between titanium and iron is a physical property, not a chemical change. Chemical changes involve the formation of new substances with different chemical properties. Density is a measure of how tightly packed the atoms are in a material.
What type of chage is melting ice?
Melting ice involves a physical change, as it transitions from a solid state to a liquid state while maintaining the same chemical composition. The process does not alter the molecular structure of the ice, making it reversible.
What is the science behind storing batteries in the freezer?
A cooler chemical is a little less likely to undergo chemical changes. Power cells, or batteries use chemical changes. Therefore, power cells or batteries are less likely to undergo chemical changes, including "wearing out" in the refrigerator. This is not of much concern with lithiums, but it is with the good ol' flashlight cells.
Which answer lists events in order from least negative to most negative changes in energy?
To determine the order of events from least negative to most negative changes in energy, you would need to consider the specific processes involved. Generally, events like simple physical changes (e.g., melting ice) would be less negative compared to chemical reactions that release energy (e.g., combustion), which are more negative. The most negative changes would typically involve processes that require significant energy input or lead to greater entropy, such as breaking down complex molecules. Always refer to specific events for accurate ordering.
When a catalyst is present more less activation energy is needed to start a chemical reaction?
Less Ea.
What is the best term to describe a chemical reaction in which the reactants have less potential energy than the products?
A chemical reaction whose reactants have less potential energy than the products would be called an endothermic reaction.
Is less gasoline that remains in the gas tank as carbon dioxide physical change or chemical change?
The conversion of gasoline to carbon dioxide when it is burned is a chemical change, as it involves the breaking and forming of chemical bonds. This process releases energy in the form of heat and light.
Is candle wax melting exothermic?
Yes, the process of candle wax melting is exothermic because it releases heat energy as the solid wax changes into a liquid state. The energy required to break the bonds holding the wax molecules together is less than the energy released when the molecules reorganize into a more disordered liquid state.
Is titanium is less dense than iron a chemical change?
The density is a physical property not a change.
Is ice cream melting a chemical or physical change and does it involve a change in matter?
Ice cream melting is a physical change because it is a change in state from solid to liquid without altering the chemical composition of the ice cream. The process involves a change in the arrangement and spacing of the ice cream molecules as they gain energy and transition to a less ordered state.
