# What pressure (in atmospheres) could be reached when 0.1 lb of dry ice is placed in this 2 liter bottle? Temperature 86 °F (30 °C) Page 1 Its December.

## Presentation on theme: "What pressure (in atmospheres) could be reached when 0.1 lb of dry ice is placed in this 2 liter bottle? Temperature 86 °F (30 °C) Page 1 Its December."— Presentation transcript:

What pressure (in atmospheres) could be reached when 0.1 lb of dry ice is placed in this 2 liter bottle? Temperature 86 °F (30 °C) Page 1 Its December and you want to heat up your pool. It is currently 50 o F (10 o C) and you want it raised to 80 o F (27 o C) Using an electric heater, how much will it cost if 1 kilowatt-hour is 11 cents? The pool is 8.0 meters long, 4.0 meters wide and 2.0 meters deep. A. What is the volume in cubic centimeters?___________ B. What is the total grams of the water? ____________ Remember a calorie is defined as the energy needed to raise one gram of water one degree Celsius. C. How many calories will it take to raise it from 10 o C to 27 o C? _______________ D. 1 calorie = 1.163 x 10 -6 kilowatts hours. How many kilowatt-hours will you need? ____________ E. How much will it cost to heat the pool from 50 o F (10 o C) to 80 o F (27 o C)? _______________ TEST 3: Take home: CHM151LL: Instructor: Ken Costello Name: ___________________________ List at least 5 items in or about your home that could be added to the water in the radiator to keep the water from freezing.

Theres a night club in Philadelphia called Chemistry The décor inside follows a chemistry theme. Naturally, college students who take chemistry make up a good fraction of the patrons. Two got in an argument about which has more calories, a 12 fl. oz. bottle of beer or a vodka martini containing a shot of 100 proof vodka. They both agreed that the martini is basically just ethanol. The label on the beer said 5% alcohol (v/v) with 6.6 grams of carbohydrates, 2.2 grams of protein, and 0.0 grams fat. They knew that both carbohydrates and proteins produce 4 kcal per gram. Fat is 9 kcal but no fat was there. They didnt know the kcal per mL or kcal per gram of ethanol. If they found the calories of ethanol given per gram, they would need to know the density (g/mL) of ethanol. They also had to convert 12 fl.oz. and 1 shot to milliliters. A friend had a Palm Pilot with Internet connection, so they got the data and figured out which drink had the most calories. They calculated that 1 shot of 100 proof vodka had about 160 kilocalories, which was more than what they figured for the beer. Show your calculations here or on a separate sheet to verify or refute their result. Page 2