15. 228 J/kg · K 601 J/kg · K 495 J/kg · K 580 J/kg · K 16. Water has a specific

Question

15.

228 J/kg · K

601 J/kg · K

495 J/kg · K

580 J/kg · K

16.

Water has a specific heat capacity that is about 10 times that of iron. In an experiment, a 50-g pellet of iron at a temperature of 200°C is dropped into 50 g of water at a temperature of 20°C. When the system reaches thermal equilibrium, the temperature will be closest to _____.

200°C

110°C

0°C

20°C

17.

567 K

540 K

512 K

523 K

15.

A 100-g aluminum calorimeter contains 500 g of water at a temperature of Then a 140-g piece of metal, initially at is added to the calorimeter. The metal, water, and calorimeter reach an equilibrium temperature of What is the specific heat capacity of the metal? The specific heat capacity of aluminum is 910 J/kg ? K, and of water is

228 J/kg · K

601 J/kg · K

495 J/kg · K

580 J/kg · K

16.

Water has a specific heat capacity that is about 10 times that of iron. In an experiment, a 50-g pellet of iron at a temperature of 200°C is dropped into 50 g of water at a temperature of 20°C. When the system reaches thermal equilibrium, the temperature will be closest to _____.

200°C

110°C

0°C

20°C

Explanation / Answer

15)

mass of water , m = 500 gm

mass of aluminium , Mal = 100 g

Now, let the specific heat of metal is Sm

Now, heat lost by metal = heat gain by water and aluminium

140 * Sm * (344 - 32) = 100 * 0.910 *(32 - 20) + 500 * 4.19 *(32 - 20)

solving for Sm

Sm = 0.601 J/gm*K

the specific heat of metal is 601 J/(Kg*K)

please post other questions in a seperate posts

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