18.Which shows chemical weathering?
2 answers:
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Answer: Equilibrium concentration of at
is 4.538 M
Explanation:
Initial concentration of = 0.056 M
Initial concentration of = 4.60 M
The given balanced equilibrium reaction is,
Initial conc. 0.056 M 4.60 M 0 M 0 M
At eqm. conc. (0.056-x) M (4.60-2x) M (x) M (6x) M
The expression for equilibrium constant for this reaction will be,
Given : equilibrium concentration of =x = 0.031 M
Concentration of = (4.60-2x) M =
=4.538 M
Thus equilibrium concentration of at
is 4.538 M
The final temperature = 36 °C
<h3>Further explanation</h3>The balanced combustion reaction for C₆H₆
2C₆H₆(l)+15O₂(g)⇒ 12CO₂(g)+6H₂O(l) +6542 kJ
MW C₆H₆ : 78.11 g/mol
mol C₆H₆ :
Heat released for 2 mol C₆H₆ =6542 kJ, so for 1 mol
Heat transferred to water :
Q=m.c.ΔT