CHEM 105-4SDF

CHEM 105-4SDF - p as EtOH) at 33°C is poured into the can....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Thermochemistry Things to know 1. Energy is conserved. Heat is a form of energy. 2. 3. Specific Heat Capacity a. Defined as the amount of energy (in calories) that it takes to heat one gram of substance by one degree Celsius (or Kelvin). b. Expressed in units of c. Will be told to you in the problem, if you need it. i. Water is 4.184 Practice: 1. 10.5 grams of water is heated from 0°C to 45°C. What is the total change in energy for the system? 2. Ethyl Alcohol is chilled in a two-piece aluminum can that can show when it is finally “Rocky Mountain Cold.” The can is initially below freezing, let’s say at -10°C, and then beer (assume beer has the same c
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: p as EtOH) at 33°C is poured into the can. What is the final temperature of the beer and the can, and why doesn’t the beer freeze? c pEtOH =2.46 , and c pAl =.900 . 3. Challenge Yourself for Next Time: You stop at Starbucks for a 200g cup of coffee to wake up before coming to SI. You take the first sip and realize that it is really hot, 99.2°C, as your handy pocket thermometer told you. Because you want to drink it all before you get to the session, you add 8.2 g of ice at -3°C to the coffee. What is the final temperature of the coffee? H Δ fus-ice =6.01kJ/mol, c p-ice =2.13 ....
View Full Document

This note was uploaded on 03/01/2009 for the course CHEM 105 taught by Professor Kenney during the Spring '08 term at Case Western.

Page1 / 2

CHEM 105-4SDF - p as EtOH) at 33°C is poured into the can....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online