A reaction has a K = 1.0 x 10 -3 at 35 o C and 2.5 x 10 -2 at 25 o C. The reacti

Question

A reaction has a K = 1.0 x 10-3 at 35 oC and 2.5 x 10-2 at 25 oC. The reaction is

Exothermic

Cannot tell.

Gaseous

Endothermic

1 points   

QUESTION 2

A particular reaction had K = 0.0800 at 25oC. Calculate Go in kJ (or kJ/mol).

1 points   

QUESTION 3

A reaction has a DGo of 22.3 kJ (or kJ/mol) at 25oC. Calculate K.

1 points   

QUESTION 4

For a particular reaction, K = 0.00133 at 25oC and K = 0.0133 at 125oC. Calculate Ho in kJ (or kJ/mol).

1 points   

QUESTION 5

If a reaction has a K = 0.100 at 500. oK and a Ho = -25.2 kJ (or kJ/mol), what would K be at 600. oK. [Note: I use oK here to distinguish temperature from the symbol for the equilibrium constant, but that is old-fashioned.]

Exothermic

Cannot tell.

Gaseous

Endothermic

Explanation / Answer

1)

Here K is increasing as temperature decreased

SO, forward reaction is favoured as temperature decreases

we are decreasing temperature here

so, according to Le Chatelier's principle,

equilibrium will move in direction which release heat

hence, forward reaction must release heat

It is exotehrmic

Answer: Exothermic

2)

T= 25.0 oC

= (25.0+273) K

= 298 K

we have below equation to be used:

deltaG = -R*T*ln Kc

= - 8.314*298* ln(8*10^-2)

= 6257.6746 J/mol

= 6.26 KJ/mol

Answer: 6.26 KJ/mol

Only 1 question at a time please

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.