1.) a metal sample weighing 147.90g and at a temperature of 99.5 c was placed in

Question

1.) a metal sample weighing 147.90g and at a temperature of 99.5 c was placed in 49.73g of water in a calorimeter at 23.0 c. at equilibrium the temperature of the water and metal was 41.8 c.

a. what  was delta t for the water

b. what was delta t for the metal

c. how much heat flowed into the water? ( take the specific heat of the water to be 4.18 J/g c

d. calculate the specific hear of the metal

e. what is the approximate molar mass of the metal   

part 2 :

when a 4.98 g of NaOH was dissolved in 49.72g of water in a calorimeter at 23.7 c, the temperature of the solution went up to 50.1 c

1.) calculate qh2o

2.) find delta H for the reaction as itoccured in the callorimeter using this equation: q reaction= delta h reaction = qh20

3.) find delta h for the dissolution of 1.00 g NaOH in water

4) find delta H for the dissolution of 1 mole in NaOH in water

5) given that NAaOh exists as Na+ and OH- ions in solution, write the equation for the reaction that occurs when NaOH is dissolved in water.

Explanation / Answer

1.) a metal sample weighing 147.90g and at a temperature of 99.5 c was placed in

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