Well I know to calculate heat flow you use, q=ms delta t.
for this experiment we mixed naoh with hcl into water.
the total mass (volume) of the mixture was 100g
the temperature change for naoh was 11.7 degrees C and for hcl it was 11.8 degrees C
now im looking to calculate heat flow
so so far i've got
q= (100.0g h20)(4.18 j/g degrees C) ( ??????) do I put the hcl or the naoh, or the average of both temperatures combined..... or am i supposed to calculate twice, once for the hcl and once for the naoh?
thanks.
If you want heat flow (I don't know where your going with this problem in the end), at this point I would go with doing it twice, once for HCl and once for NaOH. Depending upon where you are going, you may want to take the average latr on. By the way, someone needs to tell you that your lower case style, typical of texting till you drop, sends the wrong message. naoh, hcl, and h2o are NOT the same as NaOH, HCl, and H2O. I'm guessing that's what you meant.
To calculate the heat flow for the mixture of NaOH and HCl in water, you will need to calculate the heat flow separately for NaOH and HCl and then add them together.
First, let's calculate the heat flow for NaOH:
q(NaOH) = (mass of NaOH)(specific heat of water)(change in temperature of NaOH)
From the information you provided, the mass of water in the mixture is 100g. However, you haven't specified the mass of NaOH in the mixture. Once you have the mass of NaOH, you can substitute it into the equation along with the specific heat of water, which is approximately 4.18 J/g°C, and the change in temperature of NaOH, which is 11.7°C. Multiply these values together to calculate the heat flow for NaOH.
Next, let's calculate the heat flow for HCl:
q(HCl) = (mass of HCl)(specific heat of water)(change in temperature of HCl)
Similarly, you will need to know the mass of HCl in the mixture. Once you have that information, substitute it into the equation along with the specific heat of water and the change in temperature of HCl, which is 11.8°C. Multiply these values together to calculate the heat flow for HCl.
Finally, to determine the total heat flow for the mixture, add the heat flows for NaOH and HCl together:
q(total) = q(NaOH) + q(HCl)
Remember to ensure that the specific heat and temperature units are consistent throughout the calculation.