In terms of energy, how would you classify the following chemical reaction? 2Cu + O2 + 315kJ → 2CuO

Chemistry

1 answer:

german3 years ago

4 0

It'd be an endothermic reaction because it requires an input of heat to occur

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The equilibrium constant, Kc, for the following reaction is 83.3 at 500 K. PCl3(g) Cl2(g) PCl5(g) Calculate the equilibrium conc

Alik [6]

Answer:

$[PCl_3]=[Cl_2]=0.068M$

$[PCl_5]=0.385M$

Explanation:

Hello!

In this case, since the equilibrium expression for the considered equation is:

$Kc=\frac{[PCl_5]}{[Cl_2][PCl_3]}$

Which can be written in terms of the reaction extent and the ICE chart and the initial concentrations of 0.453 M as shown below:

$83.3=\frac{x}{(0.453M-x)(0.453M-x)}$

We can solve for x as follows:

$x=0.385M$

In such a way, we obtain the following concentrations at equilibrium:

$[PCl_3]=[Cl_2]=0.453M-0.385M=0.068M$

$[PCl_5]=0.385M$

Best regards!

6 0

3 years ago

Ionic bonds are formed between metal and nonmetal elements. Potassium has only one valence electron and it is stripped away in t

lbvjy [14]

Refer to the table below. Credits to https://terpconnect.umd.edu/~wbreslyn/chemistry/naming/IonicCharge2.jpg

Cations with (+ ) charges lose electrons in order to obtain an octet (8 valence electrons) when they ionically bond with another ion. We're looking for the ions that loses electrons here. So, from the table:

Al 3+ , S 2- , O 2-, Ag + , Ne ( noble gas, no charge)

Since Al and Ag has (+) charges, they are going to lose electrons to form ionic bonds with other atoms.