[Le Wild Kefka]

1) At which temperature the combustion of methane is not favored?

2) How many kilograms of methane would be spent if a person takes a shower with water at 30°C and he occupied 40 liters of water, have in mind that the initial temperature of water is 20°C


Thanks in advance!

[sjb]

1) At which temperature the combustion of methane is not favored?

2) How many kilograms of methane would be spent if a person takes a shower with water at 30°C and he occupied 40 liters of water, have in mind that the initial temperature of water is 20°C


Thanks in advance!

Do you have any thoughts? What have you recently been learning about?

[Le Wild Kefka]

About the problem 1:

I just calculated the free-energy (ΔG°) of the combustion of methane and  i got a negative number, which would mean the reaction is favored or spontaneus in the direction the reaction was done.

                           CH₄  +  2O₂  --->   CO₂   +  2H₂O

Conditions for spontainity are equilibrium in temperature and constant pressure.


About problem 2:

Is it possible to resolve this problem with this equation Q=msΔT?


 

[sjb]

About the problem 1:

I just calculated the free-energy (ΔG°) of the combustion of methane and  i got a negative number, which would mean the reaction is favored or spontaneus in the direction the reaction was done.

                           CH₄  +  2O₂  --->   CO₂   +  2H₂O

Conditions for spontainity are equilibrium in temperature and constant pressure.

That's a good start, what other expressions for ΔG do you know?

About problem 2:

Is it possible to resolve this problem with this equation Q=msΔT?

Yes, I think so - that would be the way I'd start