Answer:
grass, grasshopper, frog, snake, hawk
Explanation:
<span>PPCl5 = ?? atm hop it helps</span>
Answer and Explanation:
- In spontaneous reactions, activation energy (Ea) of the forward reaction is less than that for the same reaction running in the reverse direction.
- Firstly, The activation energy <em>is the minimum energy requirement for the reacting molecules to initiate the reaction.</em> <em>It is the potential energy difference between the activated complex and the reactants on the energy profile diagram.</em>
- Spontaneous reactions are mainly exothermic reactions and are represented on the energy profile diagram as shown in <em>the attached image.</em>
- <u><em>The forward reaction looks like: </em></u>Reactants (A) → products (B) + heat
As the spontaneous reaction (exothermic), the energy of the products is lower than that of the reactants.
The difference in energy between reactants and products is the enthalpy change of the reaction (ΔH).
The activation energy (Ea) of the forward direction is the difference between the energy of the the activated complex state and the reactants state.
- <u><em>In the case of the reverse direction:</em></u> B + heat → A
In the reverse direction we need a supply of energy because the reaction is converting from a more stable state (low energy) to a lower stable state (high energy).
The supply in the reverse direction is ΔH, the amount of heat released in the forward direction.
Here, the activation energy of the reverse direction will be <em>(Ea of the forward direction + ΔH)</em>.
The difference between the Ea of the reverse and forward direction is ΔH.
Ea reverse = Ea forward + ΔH.
<em>So, in spontaneous reactions, the value of the Ea of forward direction is lower than the same reaction running in the reverse direction.</em>
El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.
- Los filtros para purificar agua son dispositivos que permiten el limpiado del agua con el objetivo de convertirla apta para consumo humano.
- En general, los filtros para lograr la purificación del agua consisten de carbón activado, el cual se prensa con alta presión.
- Este dispositivo de carbón activado permite secuestrar las partículas sólidas que pasan a través del filtro, con lo cual el agua sale a través del filtro completamente purificada.
Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:
- El agua sale cristalina, es decir, sin ningún tipo de color que evidencie la presencia de contaminación.
- El pH del agua potable debe oscilar entre valores normales (6,5 a 8,5)
- No debe contener metales tales como plomo, arsénico o cadmio (altamente tóxicos)
- No debe contener microorganismos
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