I think the correct answer would be <span> sugars digested by saliva. This describes a chemical change since new substances are produced since reaction happens due to the enzymes in the saliva. Hope this answers the question. Have a nice day.</span>
Work done=mgh
W=force*height
W=5N*0.50mts
W=2.5joule
The Q in the enthalpy of fusion equation stands for heat energy absorbed or released.
<h3>What is enthalpy?</h3>
In thermodynamics, enthalpy is a measure of the heat content of a chemical or physical system.
The enthalpy of fusion is the amount of heat energy required to convert a unit mass of a solid at its melting point into a liquid without an increase in temperature.
Its units are usually Joules per gram (J/g) or calories per gram (cal/g).
The enthalpy of fusion equation is given as follows:
Q = m·ΔHf
Where;
- Q = heat energy
- m = mass
- ΔHf = heat of fusion
Therefore, the Q in the enthalpy of fusion equation stands for heat energy absorbed or released.
Learn more about enthalpy of fusion at: brainly.com/question/20897184
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Answer:
Explanation:
Allotropes are the elements that occur naturally in different forms in the nature.
For example Oxygen is in O2 state for breathing air and O3 in ozone layer.
Also C exits as diamond, graphite,coal and other numerous forms in nature.
