The water evaporates into the clouds
An endothermic reaction needs energy to proceed, such energy is usually taken from the environment surrounding the reaction. In the typical case this energy is expressed as heat. Heat is an state of atomic activity, that energy is transferred to an ENDOthermic reaction so the initial threshold of reaction is overcome and the final reaction can occur.
The molar extinction coefficient is 15,200
.
The formula to be used to calculate molar extinction coefficient is -
A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.
The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.
Rewriting the formula as per molar extinction coefficient -
ξ = ![\frac{A}{cl}](https://tex.z-dn.net/?f=%5Cfrac%7BA%7D%7Bcl%7D)
ξ = ![\frac{1.140}{1.5*10^{-4}*0.5 }](https://tex.z-dn.net/?f=%5Cfrac%7B1.140%7D%7B1.5%2A10%5E%7B-4%7D%2A0.5%20%7D)
Performing multiplication in denominator to find the value of molar extinction coefficient
ξ =
Performing division to find the value of molar extinction coefficient
ξ = 15,200 ![M^{-1} cm^{-1}](https://tex.z-dn.net/?f=M%5E%7B-1%7D%20cm%5E%7B-1%7D)
Hence, the molar extinction coefficient is 15,200
.
Learn more about molar extinction coefficient -
brainly.com/question/14744039
#SPJ4
Answer:
c. ΔH° is positive and ΔS° is positive.
Explanation:
Hello,
In this case, as the Gibbs free energy for a reaction is defined in terms of the change in the enthalpy and entropy as shown below:
![\Delta G=\Delta H-T\Delta S](https://tex.z-dn.net/?f=%5CDelta%20G%3D%5CDelta%20H-T%5CDelta%20S)
Thus, as the reaction becomes spontaneous (ΔG°<0) at temperatures above 1100K (high temperatures), it necessary that c. ΔH° is positive and ΔS° is positive as the entropy will drive the spontaneousness as it becomes smaller than TΔS°.
Best regards.
Answer:
Es casi como si este sitio se utiliza para responder preguntas académicas, no para ch/atear ocioso
Explanation:
:)