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Water has three states
Solid (ice)
liquid (water)
gas (steam)
When water is heated it expands and when it is cooled it contracts until about 4 degrees Celsius when it begins to expand again.
So the answer to your question is it depends on what temperature the water is. If it is a liquid and over 4 degrees then it will expand. If it is not frozen but somewhere between 0 and 4 degrees it will contract until about 4 degrees and then expand. Under 0 degrees it is ice not water, over 100 degrees it is steam not water.
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What is the difference between heat of reaction and molar heat of reaction?
The heat of reaction is the total amount of heat released or absorbed during a chemical reaction, while the molar heat of reaction is the heat of reaction per mole of a substance involved in the reaction. The molar heat of reaction allows for comparison of the energy changes between different reactions on a per mole basis.
What is the relationship between the heat of reaction and the heat of formation in a chemical reaction?
The heat of reaction is the difference between the heat of formation of products and reactants in a chemical reaction. It represents the amount of heat released or absorbed during the reaction. The heat of formation is the heat change when one mole of a compound is formed from its elements in their standard states. The relationship between the two is that the heat of reaction is related to the heat of formation of the substances involved in the reaction.
What is the difference between the heat (q) of a reaction and the reaction enthalpy (Hrxn)?
The heat (q) of a reaction is the amount of energy transferred as heat during a chemical reaction, while the reaction enthalpy (Hrxn) is the overall change in heat energy of a reaction at constant pressure. The main difference is that heat (q) is the actual energy transferred, while reaction enthalpy (Hrxn) is a measure of the total heat change in a reaction.
What is the difference between enthalpy and heat of reaction in a chemical reaction?
Enthalpy is the total heat content of a system, including both heat absorbed and released during a reaction. Heat of reaction specifically refers to the heat released or absorbed when a specific chemical reaction occurs.
Is the heat of reaction the same as enthalpy?
No, the heat of reaction is not the same as enthalpy. Enthalpy is a measure of the total heat energy in a system, while the heat of reaction specifically refers to the heat energy released or absorbed during a chemical reaction.
