Recent content by mertzi

Ok thank you for your help!

OK! Could this be because how well distributed your mixture of CuO and charcoal is before applying heat?

I don't understand the last question? Do you mean how it looks? I don't know how it looks, google image search says it looks red/orange. Actually I think other students had this happen, me and my lab partner were the only who got much solid copper, we saw this when we disposed our product. Our...

Then the CuO would be excessive instead of the C? But do you really count "leftovers" as something that form in a chemical reaction?

Carbon monoxide and carbon trioxide but those are not solids. Also Cu2O and Cu2O3 but these are still copper oxides? I'm sorry I've been reasoning here for 20 minutes but I really get nowhere.

Yes, I know other oxides like iron oxide, aluminium oxide etc. Do you mean I should post all oxides I can think of? I'm sorry to say that it's not encouraging to be met with such condescension.

I think so but the only other elements I can think of that can take part of the reaction is nitrogen or water from the air.

Hello! I really hope I get my post right this time because if not the rules are really hard to understand. 1. Homework Statement We did a lab the other day where copper(II)oxide reacts with carbon (charcoal powder) when adding heat from a bunsen burner. Our experiment was a success but I'm...

Woo hoo, thank you! Knowing these properties go any direction clears up a lot of confusion. One final question just to see if I've understood everything correctly. If both ice and water is 273K from the start then nothing will happen?

Thank you Here is my first attempt on a solution, I suspect something is missing. ΔQ=cice⋅mice⋅ΔT = 2.2kJ/(kg⋅K)⋅0.1kg⋅10K = 2.2kJ Then 2.2kJ = m⋅Lwater m = 2.2/332 ≈ 6.6⋅10-3kg mice total = mice 0+mice 2 = 0.1+6.6⋅10-3 = 0.1066kg

thank you, I'm uncertain if this is the same we have been thought about enthalpy because in our tables we have these specific formulas for phase changes with lower case l. Like ΔQ=lm⋅m and ΔQ=lv⋅m (m=melt, v=vaporize). I've made an attempt at a solution in my OP, can I use this method for any...

Hi! I'm new here and I can't find anything helpful through google so I thought I'd give PF a try. Sorry for not using the template fully but I have no ideas on how to solve this problem. 1. 0.1kg ice at 263K is added to 1kg water at 273K. Calculate new mass of the ice. 2. I know how to do this...