Jeena

What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?

Do you mind posting up an example for that please? It would help out a out: What is the activation energy for a reaction whose rate tripled when temperature rose from 28 to 53C.

In the reaction 2 H2(g) + S2(g) reverse reaction arrow 2 H2S(g), Kc = 6.28 multiplied by 103 at 900 K. What is the equilibrium value of [H2] if at equilibrium [H2S] = [S2]1/2?

3H2(g) + N2(g) reverse reaction arrow 2NH3(g) What factors would affect the equilibrium constant for the reaction above? (Select all that apply.) increasing the H2 concentration decreasing the NH3 concentration increasing the temperature decreasing the te...

SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. ---How many moles/liter of NO2 would have to be added to the origin...

Citric acid (pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40) is found in citrus fruit. Calculate the approximate pH of lemon juice, which is about 5% citric acid by mass. Can someone set this one up for me?

During a road test,a driver brakes a 1420kg car moving at 64.8km/h [W]. The car slows down and comes to a stop after moving 729m [W]. What is the net force acting on the car?

A metal rod is made of 26kg of iron, how much heat must be supplied to the radiator to raise its temperature from 25 Celsius to 55 Celsius? My answer is Q= 350, 220J Follow up question If a boiler generateswater at 79.5 Celsius what mass of water is neede...

but I don't have the K or the Ea. Do you mind posting a sample?

I got 896.3 KJ. Does this seem right?

actually, the right answer was 35.8 KJ

I also just found this site. DrBob222 is great!

for this one, when we set up the ice chart, and we have the M of HI, and we have to subtract x, would we subtract 2x because the mols of HI is two?

I tried to answer the hwk using this tip for part B, but I didn't get it right...is there another way to set it up?

The answer is only temperature changes. The equilibrium constant becomes larger with a temperature change, the forward reaction is favored and the eq. shifts to the right. If the constant becomes smaller, the reverse reaction is favored and shifts to the...

i thought you would have to decrease x from SO2?

So I found that you would have to set it up using (4.1)(3.1)/(2.9)(x-1.1). The x includes the .5 of NO2 already added, so to find how much was added to the original, find x and just subtract .5. The "x" value was the new initial value used to raise SO3 to...

The first and second question are related sir. But i cant see the use of the initial temp on the second question. To solve for the mass on the 2nd question what change in temp will i use?

Youre right sir. Am i going to use this eqn Q=mc deltaT Where my change in temp will be 79.5-55 C?

Okay thank you sir