Recent content by Tom Hardy

I see, that sounds more appropriate. Thanks again for your help.

My bad, forgetting the basics. For the second part I'm not sure, perhaps the enthalpy of vaporisation/fusion, assuming the enthalpy of reaction is quoted in terms of the substances in their gas forms, but the question says the feed is frozen, we would need the enthalpy of vaporisation and...

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I have an idea for the second part, we don't want the reaction to go forward, so we're looking for a negative extent of reaction or an extent of reaction of 0. So if we go back to my original statement for extent: $$ 18.45 = \frac{(0.7+0.5\zeta)(1-0.5\zeta )}{(0.3-\zeta)^2} $$ I can let the mole...

0.8 for methane and 0.2 for hydrogen, to 1 DP.

I'll try.. $$ K = 1.23 bars = \bigg[ \frac{P_{CH_{4}}}{P_{H^2_{2}}}\bigg] = \frac{1}{15} \bigg[ \frac{y_{CH_{4}}}{y^2_{H_{2}}} \bigg] $$ This is where I might start being wrong, we start with C + 2H2 --> CH4, but the question states that the 'feed' is 30% hydrogen and 70% methane. So taking...

Damn, sorry about that. Recalculating with the new Gibbs free energy of formation I arrive at a K value of 1.23 bars^{-1} which is more appropriate, the conversion will also be large. So the reaction is definitely feasible/spontaneous at 800K, I can work out the conversion but I think it will...

So for the first part, I'm getting a strange answer. First getting the standard entropy change: $$ \Delta S^o = \frac{\Delta G^o - \Delta H^o}{-298} = -421.6 \frac{kJ}{kmol K} $$ Getting change in heat capacities: $$ \Delta C_p = C_p(CH_4) - 2C_p(H_2) - C_p(C) = -44.237 + 0.03027T...

Thanks Chet, any tips on how to approach part ii?

How would one approach part I and II? In terms of thermodynamics I'm not sure how I can show that this hypothesis is true. Could I work out the equilibrium constant and make a decision based on its magnitude? For example if it is >>> 1 then the hypothesis is true, would that be correct? For the...

Thank you, my only concern is the limits of integration. Seemingly, the lower is limit is the liquid phase volume, but how can we use this with the EoS that is only valid for gases?

Homework Statement For some reason it is not letting me add the image here, here is the link to the question: http://imgur.com/a/3DLWM The part I'm stuck on is the last part. Basically, the question is to obtain the following equation for the entropy of vaporisation using the Redlich-Kwong...

Hello, I have a general question regarding energy coupling in multi phase flow. My question comes is based on the text from this book...

Thanks, it's not really large in reality, it was just the concept I was confused about.

Ah, I see, so the only issue at the start is priming the system so that a siphon exists?