The total amount of mass in a system remains constant regardless of the changes that take place in that system.
Energy is neither created or destroyed; it only changes form.
Half-way down the ramp, PE = 50J and KE = 50J.
In this energy pyramid, all the energy from level is transferred to the next level.
In a closed system, i.e., a system that isolated from its surroundings, the total energy of the system is conserved.
All the statements regarding law of conservation of energy are true except for statement 2 stating energy changes half way down the ramp.
According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.Energy of an isolated and closed system remains constant.
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Answer:energy
Halfway
In a closed system..3
Explanation:
Energy from an outside source is continuously being added
B.
The reaction container always feels cold.
C.
The reactants have more heat energy than the products.
D.
More heat is given off than is put into the reaction.
The statement which is true about exothermic reactions is as follows:
Thus, the correct option for this question is C.
An exothermic reaction may be defined as a type of reaction in which energy is significantly liberated in the form of heat or light. In such types of reactions, energy is generally transferred into the surroundings rather than utilized from the surroundings.
The option "energy from an outside source is continuously being added" represents an endothermic reaction in which heat or light energy is externally been provided. The option "more heat is given off than is put into the reaction" is not absolutely true because exothermic reactions liberate energy but it does not matter if it is higher or lower than that of being put into the reaction.
Therefore, the reactants have more heat energy than the products is a statement that is true about exothermic reactions. Thus, the correct option for this question is C.
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They can interbreed and produce fertile offspring.
B.
They are members of the same population.
C.
They have identical physical characteristics.
D.
They live in the same geographical location.