To study heat transfer, a group of students conducted the following experiment. They took two 100 mL water samples at two different temperatures, mixed them together, and recorded the temperatures. Use the data below to answer questions 1-2. Cup Volume (mL) Temperature (°C) 1 50 12 2 50 40 Mixture of 1 and 2 100 1. Based on the information provided in the table above, in which direction will heat flow between the two water samples when they are mixed? A. Heat will flow from cup 1 to cup 2. B. Heat will flow from cup 2 to cup 1. C. Heat will flow from both cups. D. No heat flow will occur.

To study heat transfer, a group of students conducted the following experiment. They took two 100 mL water samples at two different temperatures, mixed them together, and recorded the temperatures. Use the data below to answer questions 1-2. Cup Volume (mL) Temperature (°C) 1 50 12 2 50 40 Mixture of 1 and 2 100 1. Based on the information provided in the table above, in which direction will heat flow between the two water samples when they are mixed? A. Heat will flow from cup 1 to cup 2. B. Heat will flow from cup 2 to cup 1. C. Heat will flow from both cups. D. No heat flow will occur.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 5.60QE

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This was a lab I performed where we mix aqueous 25ml HCl and 25ml NaOH and use a program called microlab to determine the cooling rate after the initial heating. We used a coffee cup calorimeter that had a stirring bar. At first, NaOH solution is by itself in the coffee cup calorimeter. It’s temperature was 23.02 C. I waited for 70 seconds and then added the 25ml of HCl to it. The temperature rose to 29.59 C, then began to cool down immediately. The cooling rate was y=0.0089x+26.1273 according to the program. The final weight of the solution was 47.147g. The moles of NaOH was 0.919M and HCl was 1.033M. The question: Using the volumes and concentrations of the HCl and NaOH solutions used in the experiment,calculate the moles of H2O formed in the neutralization reaction.
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