Question

1.       A calorimeter contains 125g of water at 40.6*C. A 7.55 g object is 63.0C is inside the calorimeter. When equilibrium is reached, the new temperature of water and the metal object is 42.6*C, determine the specific heat of the metal object.

2.       If the equivalence point was determined to be 7.6 for an acid base titration of acetic acid and sodium hydroxide, calculate the molarity of the acetic acid in the hot sauce if 6.00mL of 0.1 M NAOH was used for 1.5g of hot sauce. CH3COOH + NaOH -à CH3COONa + H2O

3.       ACID BASE OR SALT

Mg(OH2)            NaCl                   CaO                    HCl                      H2SO4               NaOH

4.       Calculate the % error if a student completes the molar mass of ethnol experiment and determine the molar mass to be 49.19 g/mol when the actual molar mass of ethanol is 46.07 g/mol

5.       Calculate the molar mass of a gas if 2.50g occupies 0.875L at 685mm Hg amd 35*C.

6.       What element has the following electron configuration?

7.       When .180 kg water is warmed from 20*C to 95*C how much heat energy, in Kj, is needed? Specific heat H20= 4.184 j/g*C

Answer 1

1.

Mass of water

Specific heat of water

Temperature change

The heat gained by water

Mass of metal object

Specific heat of metal object

Temperature change

The heat lost by metal object

But, The heat gained by water heat lost by metal object

Hence, the specific heat of the metal object is .