In a calorimeter, 6.68 kJ of heat was absorbed by 20 g of ice. What is the enthalpy of fusion of the ice? q=m∆ahf
Answers
Answer : The enthalpy of fusion of ice is, 334 J
Solution :
Formula used :
Where,
q = heat absorb = 6.68 KJ = 6680 J
m = mass of ice = 20 g
= enthalpy of fusion of ice = ?
Now put all the given values in this formula, we get the enthalpy of fusion of ice.
Therefore, the enthalpy of fusion of ice is, 334 J
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U: V2=?
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A chemical reaction is a process in which one or more substances (reactants) are transformed into one or more different substances (products). During a chemical reaction, chemical bonds between atoms in the reactants are broken, and new bonds are formed to create the products. This transformation often involves the rearrangement of atoms and the exchange of energy.
Key characteristics of a chemical reaction include:
1. **Reactants:** These are the substances that undergo the chemical transformation. They are present before the reaction begins.
2. **Products:** These are the substances that result from the chemical reaction. They are formed as a result of the rearrangement of atoms from the reactants.
3. **Chemical Equations:** Chemical reactions are typically represented using chemical equations, which show the reactants on the left side and the products on the right side. For example, the reaction between hydrogen and oxygen to form water is represented as: 2H2 + O2 → 2H2O.
4. **Conservation of Mass:** In a closed system, the total mass of the reactants is equal to the total mass of the products, according to the law of conservation of mass.
5. **Energy Changes:** Chemical reactions may release or absorb energy. Reactions that release energy are exothermic, while those that absorb energy are endothermic.
Chemical reactions are fundamental to chemistry and play a crucial role in various natural and industrial processes. They are involved in everything from the digestion of food in our bodies to the combustion of fuel in engines, and they underlie the synthesis of a wide range of substances, from pharmaceuticals to materials used in everyday life. Understanding and controlling chemical reactions is essential in fields such as chemistry, biology, and engineering.
Answer:
a chemical reaction is a process in which two or more chemicals react with each other