# Yahoo Web Search

related to: K

1. ### First order reaction - rate constant ( k )?

...you're given Ea and two temps and asked to calc k .. .. . .whenever you read Ea, T and k (or rate) in the same equation...

2 Answers · Science & Mathematics · 01/06/2020

2. ### Need help finding magnitude of K .?

from the arrhenius equation .. k = Ao exp(-Ea / RT) for 2 conditions of different ...

1 Answers · Science & Mathematics · 09/02/2020

3. ### Q and K Values Chemistry?

Because Q < K , the reaction will proceed to the right to reach equilibrium at which point Q = K

1 Answers · Science & Mathematics · 06/06/2020

4. ### The reaction 2CH4(g)⇌C2H2(g)+3H2(g) has an equilibrium constant of K = 0.154. If 6.60 mol of CH4, 4.35 mol of C2H2, and 11.65 mol ?

...]^3 .. Q = ---- ---- ---- ---- ---  .. ... ... ... ..[CH4]^2 if Q > k , then the rxn is shifted to the left if Q < k ...

2 Answers · Science & Mathematics · 08/08/2020

5. ### Determine the rate law for the following reaction and the value of the rate constant, k . 2 NO(g) + O2(g) → 2 NO2(g)?

...the reaction is first order with respect to [O2]. Rate = k [NO]^2 [O2] Use any reaction to calculate the value of k : 5....

1 Answers · Science & Mathematics · 10/06/2020

6. ### The standard free energy change associated with the dissolution of ammonium nitrate in water is –6.73 kJ at 298 K . NH4NO3(s) NH4NO3(aq)?

ΔG° = -R T ln( K ) -6.73 = -(8.31 × 10⁻³) × 298 × ln( K ) ln( K ) = 2.72 K = e²˙⁷² Equilibrium constant for the reaction, K = 15 The answer: d. 15

1 Answers · Science & Mathematics · 11/04/2020

7. ### If 200 L of gas at 20 K is heated to 40 K , what is the new volume?

Assuming that the pressure does not change, V1/T1 = V2/T2 200 L / 20 K = V2 / 40 K V2 = 400 L

2 Answers · Science & Mathematics · 10/09/2020

8. ### A gas’ volume at 0 degrees Celsius is 1.00 L. If the gas’ volume is increased to 200 L at a constant temperature, what’s the new temp in K ?

... T₂ = V₂T₁/V₁ T₂ = 2.00 * (0 + 273.15 k )/(1.00 L)  = 546.3 K

1 Answers · Science & Mathematics · 15/08/2020

9. ### A sample of He gas, 2.35 mol, occupies 57.9 L at 300.0 K and 1.00 atm. The volume of this sample is ________ L at 342 K and 1.00 atm.?

(57.9 L) x (342 K / 300.0 K ) = 66.0 L So answer c.

1 Answers · Science & Mathematics · 10/12/2019

10. ### For an exothermic reaction, higher temperature causes K to decrease.  So why do fires, which are exothermic, require heat to start?

kinetics (and specifically activation energy in this case) are not the same as thermodynamics.  In effect, once an exoothermic reaction commences, it generally provides enough energy to maintain itself (its energy output is employed to drive additional leaps over the...

1 Answers · Science & Mathematics · 29/07/2020