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bearhunter [10]
3 years ago
14

If the enthalpy value for a reaction is negative, what does that indicate about the reaction? Please explain

Chemistry
1 answer:
Likurg_2 [28]3 years ago
4 0

A) it is endothermic and heat is absorbed by the system.

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A typical neon light contains neon gas mixed with argon gas.  If the total
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The partial pressure of argon is:

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4 years ago
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The value of ka for nitrous acid (hno2) at 25 ∘c is 4.5×10−4. what is the value of δg at 25 ∘c when [h+] = 5.9×10−2m , [no2-] =
LuckyWell [14K]
To get the value of ΔG we need to get first the value of ΔG°:

when ΔG° = - R*T*㏑K

when R is constant in KJ = 0.00831 KJ

T is the temperature in Kelvin = 25+273 = 298 K

and K is the equilibrium constant = 4.5 x 10^-4

so by substitution:

∴ ΔG° = - 0.00831 * 298 K * ㏑4.5 x 10^-4

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then, we can now get the value of ΔG when:

ΔG = ΔG° - RT*㏑[HNO2]/[H+][NO2]

when ΔG° = -19 KJ

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and T is the temperature in Kelvin = 298 K

and [HNO2] = 0.21 m & [H+] = 5.9 x 10^-2 & [NO2-] = 6.3 x 10^-4 m  

so, by substitution:

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8 0
3 years ago
Select the reasons why organisms are classified. Check all that apply.
natali 33 [55]

Answer:

ACDE

Explanation:

just answered this question on edg

7 0
3 years ago
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Calculate the enthalpy change for the reaction 2 hcl → h2 + cl2 1. +184 kj/mol of rxn 2. +428 kj/mol of rxn 3. 0 kj/mol of rxn 4
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Below is the list of enthalpies of formation of the compounds involved in the chemical reaction.

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Since, in the reaction there are 2 moles of HCl,
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Hence, the answer is the first choice. 
5 0
3 years ago
An Erlenmeyer flask contains 25.00 mL of 0.10 M HCl. What is the pH of the solution?
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C=0.10 mol/l

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4 years ago
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