Recent content by higheye

is the carnot efficiency, at 56%, not the answer? why has it given me the 1 mole information and electrical energy information?

Is there a way to find out how much electrical energy can be generated form 498.4 kJ of mechanical? I am seriously out of practice with area of physics sorry

1 - ( 343.15 / 773.15 )

I mistaskenly used the upper temperature as 575.15 K instead of 773.15 K. I have repremanded this and my new results is 498.4 kJ

I re-calculated the mechanical energy and resulted in 356 kJ, I have been researching and to no avail have I been able to progress with working out how much electrical energy is produced. Maybe I am looking for the wrong thing? I been looking for equations or conversions for mechanical enrergy...

ah so i can take the second equation like this: 1 - ( 70 / 500 ) = 0.86 then I can re-arrange the the top one: work done = 0.86 * 890 kJ? this come out to work done = 765.4 kJ Is this sensible? i really don't know?

efficiency = work done by system / energy put in am i right in calculating the work done is the energy used to transfer 890 kJ from the methane, heating up the water to boiling then vapourising then heating steam to 500 C? Is the above equation the same as: 1 - (the absolute temperature of...

Yeah i picked up on this difference in temperature but didn't know what to do with it and what the loss of 430 C ment, i'll research the carnot cycle now thanks

This is the 4th question of the sheet, it directly asks; Once the power station ia ready, calculate its thrmodynamic efficiency, assuming cooling towers maintain a temperatue of 70 degrees C and hence the amount of electrical energy (in J) from one mole of methane. Thats the question as it...

I have to calculate the thermodynamic efficiency of a power station. I have to assume the cooling towers maintain 70 degrees C and hence the amount of electrical energy (in J) from one mole of methan. I've been given the enthalpy of combustion of Methane. I know the thermo efficiency is (sum of...