Saturday

August 30, 2014

August 30, 2014

Posted by **Anonymous** on Sunday, April 15, 2012 at 7:44pm.

How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F?

correct answer: 279kj

How much alcohol must be burned to generate enough heat to warm the water as described in problem 3?

correct answer: 10.4

the only mention of an alcohol is ethyl alcohol (C2H6O) in the question before this where you find its heat of combustion.

correct answer: -1238.43 kJ/mol

- chem 101 -
**DrBob222**, Sunday, April 15, 2012 at 10:00pm60F is 15.55 C

180 F is 82.22C

delta T = 82.22-15.55 = 66.67

q = mass x specific heat x delta T

q = 100g x 4.184 x 66.67

q = 278,947 = 279 kJ.

Burning alcohol (46 g ethanol) provides 1238.43 kJ/mol. We want to know how many g ethanol to burn to provide 279 kJ.

46 g x (279/1238.43) = 10.36 g which rounds to 10.4 g.

**Related Questions**

chem 101 - How much heat is required to raise the temperature of exactly one ...

chem 101 - How much heat is required to raise the temperature of exactly one ...

Chem 101 - Using the "Unit conversion method", derive an equation to calculate ...

Chem 101 calorimeter - Using the "Unit conversion method", derive an equation to...

physics - An ice bag containing 0°C ice is much more effective in absorbing heat...

science - Finishing his ginger ale, Ramesh stands at the party holding his ...

Physics - How much heat is required to raise by 10.30°C the temperature of 1.2 ...

physics - (a) How much heat is required to raise by 12.40°C the temperature of 1...

Chem 101 - How many calories are required to raise the temperature of 24.4 g of ...

AP chemistry - The specified heat capacity of silver is 0.24 J/C.g. Please help ...