A25.0-g sample of a metal at 98.0 °c is placed in 50.0 g of
water at 18.0 °c. if the final temperature of the metal and
water is 27.4 °c, what is the specific heat, in j/g °c, of the
metal? (3.5)

1.114 J/g°C

Mass of the metal sample = 25.0 g

Temperature change from 98°C to 27.4° C = - 70.6°C

Assuming the specific heat capacity of the metal is x, then

Heat lost = Mass × specific heat capacity × change in temp

               = 25.0 g × x × -70.6 °C

              = -1765x joules (-ve indicates that heat was lost)

              = 1765x joules

Step 2: Calculate heat gained by water

Mass of water = 50.0 g

Temperature change, from 18.0°C to 27.4°C = 9.4°C

Specific heat capacity of water = 4.184 J/g°C

Therefore,

Heat gained = 50.0 g × 4.184 J/g°C × 9.4°C

                     = 1966.48 Joules

Step 3: Calculate the specific heat of the metal

We know that heat lost is equal to heat gained.

Therefore;

Heat lost by the metal sample = heat gained by water

1765x J =1966.48 J

       x = 1.114 J/g°C

Therefore, the specific heat capacity of the metal is 1.114 J/g°C

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.