Oh, so basically, she said that it's not a heating and cooling curve (but the example she showed is a heating and cooling curve, so I just did that ). I will send an image of it.

Quote from: Krista on May 04, 2025, 11:57:05 PMHi Dr. Uma,

I don't understand question 40. I got the final value of 14.9 or around 15 degrees Celsius, so I would assume that the answer would be c (greater than 14). However, the answer key says that it is B. How come?

 

There is no need of calculations here.
Water is at 14 degree C and Octane is at 13 degree C and Heat is transferred from water to octane then temperature should be  between 13 and 14.You must have done some sign error in calculation. However no calculations are needed for this question.

Quote from: Krista on May 05, 2025, 12:04:27 AMHi Dr. Uma,

I don't understand question 33. Isn't neon an inert gas? Why would it affect the reaction quotient and the reaction rate? What kind of situation is this? When I did other equilibrium problems, inert gases wouldn't affect the reaction. 

This is a rigid container so inert gas which is not the part of K expression can not shift the equilibrium as K is not becoming Q.

Hi Dr. Uma,

I don't understand question 33. Isn't neon an inert gas? Why would it affect the reaction quotient and the reaction rate? What kind of situation is this? When I did other equilibrium problems, inert gases wouldn't affect the reaction. 

Hi Dr. Uma,

I don't understand question 40. I got the final value of 14.9 or around 15 degrees Celsius, so I would assume that the answer would be c (greater than 14). However, the answer key says that it is B. How come?

 

nevermind i understand it now

Hi, I was confused on two questions I got wrong from the quiz 6.1. Could you please explain how to solve these?

Quote from: Siddharth_Pendyala on April 27, 2025, 08:04:43 PMThat's what I thought too but the answer the question marks as right is Platinum, not NaCl.

I will edit it.
Thanks Sid.

Quote from: uma on April 27, 2025, 07:57:45 PMYes it is clearly ionic compound and not metal. We have only one ionic compound so it is NaCl.

That's what I thought too but the answer the question marks as right is Platinum, not NaCl.

Quote from: Siddharth_Pendyala on April 27, 2025, 01:47:37 PMI was doing my quiz and saw this problem. How can the answer be Platinum (Pt) when it conducts electricity alone? Also, Pt has a melting point at 1768°C, not 801°C, which is the melting point of NaCl - I think the question's correct answer should be NaCl. Am I doing something wrong? I've flagged the question.

Yes it is clearly ionic compound and not metal. We have only one ionic compound so it is NaCl.