Answer to Question #118236 in General Chemistry for sepehr

Question

Acetone (molar mass of 58.08 g/mol), a common industrial solvent, has a heat of vaporization of +31.3 kJ/mol. If 1.0 g sample of acetone is spilt, how much energy will it absorb as it vaporizes?
1 punto
31.3 kJ
1818 kJ
538.9 J
17 J
Which of the following is not required when using a simple coffee-cup calorimeter?

the final temperature of the water
the initial temperature of the water
the mass of the coffee cup
the mass of the water in the cup
When studying chemical bonds, which of the following statements is true?

Single bonds are the shortest and weakest bonds.
Triple bonds are shorter and weaker than double bonds.
Single bonds are the shortest and the strongest bonds.
Triple bonds are shorter and stronger than single bonds.

Answer 1

1 mole(58 g) of acetone releases 31.3 kJ of energy so energy released by 1 g of acetone is equal to

$\frac{31.3\times10 ^3}{58}=539 J$

The mass of the coffee cup is not required when using a simple coffee-cup calorimeter

Triple bonds are shorter and stronger than single bonds.