2. 50 g of an unknown material is heated to 90 °C and added to 200...

Question

Question

Answer 1

Answer #1

3) let the specific heat of unknown material is S

heat lost by unknown material = heat gain by water

50 * S * (90 - 25.9) = 200 * 4.186 * (25.9 - 25)

solving for S

S = 0.235 J/(gm.K)

the specific heat of the unknown material is D) 0.235 J/(gm.K)

4)

for the heat needed to be removed

heat needed = m * L

heat needed = 4.5 * 3.33 *10^5

heat needed = 1.5 *10^6 J

the heat needed to be removed is C) 1.5 *10^6 J

Answer 2

Similar Homework Help Questions

1. There are three units of temperature. The most common are Celsius and Fahrenheit. The equation...

1. There are three units of temperature. The most common are Celsius and Fahrenheit. The equation to convert between these units of temperature is T a - T(°C) = - (T(°F) – 32°) What is the temperature in Fahrenheit if the temperature in Celsius is 23°C? A. 73.4 °F B. 44.8 °F C. 9.4 °F D.-19.2 °F 2. 50 g of an unknown material is heated to 90 °C and added to 200 g of water at 25 °C. The...
100 g of unknown material is heated to 80 oC, and then dropped into 50 g...

100 g of unknown material is heated to 80 oC, and then dropped into 50 g of water at 20 oC in an insulated container. The water temperature rises within a few seconds to 38 oC. What is the final temperature of the metal? Find the specific heat of the metal. Please show work
(18) 7. A 28.4 g piece of metal of unknown composition is heated to 534.4 °C...

(18) 7. A 28.4 g piece of metal of unknown composition is heated to 534.4 °C and plunged into a styrofoam coffee cup containing 43.5 mL of water at 28.6 °C. Ten minutes later the system reaches thermal equilibrium at 38.4 °C. Assuming that no heat is lost to the cup or the surroundings. determine the specific heat capacity of the unknown metal

015 10.0 points A 34 g block of ice is cooled to -80°C. It is added...

015 10.0 points A 34 g block of ice is cooled to -80°C. It is added to 562 g of water in an 75 g copper calorimeter at a temperature of 24°C. Find the final temperature. The specific heat of copper is 387 J/kg. °C and of ice is 2090 J/kg.°C. The latent heat of fusion of water is 3.33 x 10° J/kg and its specific heat is 4186 J/kg.°C. Answer in units of°C.
015 10.0 points A 20 g block of ice is cooled to -87°C. It is added...

015 10.0 points A 20 g block of ice is cooled to -87°C. It is added to 566 g of water in an 64 g copper calorimeter at a temperature of 24°C. Find the final temperature. The specific heat of copper is 387 J/kg-°C and of ice is 2090 J/kg-PC. The latent heat of fusion of water is 3.33 x 10° J/kg and its specific heat is 4186 J/kg . °C. Answer in units of °C.
A 28 g block of ice is cooled to −78◦C. It is added to 562 g...

A 28 g block of ice is cooled to −78◦C. It is added to 562 g of water in an 80 g copper calorimeter at a temperature of 21◦C. Find the final temperature. The specific heat of copper is 387 J/kg ·◦C and of ice is 2090 J/kg ·◦C . The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg ·◦C . Answer in units of ◦C. i need help asap

A 26 g block of ice is cooled to −62 ◦C. It is added to 569...

A 26 g block of ice is cooled to −62 ◦C. It is added to 569 g of water in an 80 g copper calorimeter at a temperature of 27◦C. Find the final temperature. The specific heat of copper is 387 J/kg · ◦C and of ice is 2090 J/kg · ◦C . The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg · ◦C . Answer in units of ◦C.
A 25 g block of ice is cooled to −74 ◦C. It is added to 559...

A 25 g block of ice is cooled to −74 ◦C. It is added to 559 g of water in an 80 g copper calorimeter at a temperature of 21◦C. Find the final temperature. The specific heat of copper is 387 J/kg · ◦C and of ice is 2090 J/kg · ◦C . The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg · ◦C . Answer in units of ◦C.
015 10.0 points A 31 g block of ice is cooled to -80°C. It is added...

015 10.0 points A 31 g block of ice is cooled to -80°C. It is added to 547 g of water in an 98 g copper calorimeter at a temperature of 25°C Find the final temperature. The specific heat of copper is 387 J/kg °C and of ice is 2090 J/kg-oC. The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg .°C. Answer in units of C

3 pts Question 11 A 126 gram sample of ice was heated from 11.4°C to 42°C....

3 pts Question 11 A 126 gram sample of ice was heated from 11.4°C to 42°C. The Specific Heat of ice = 2.09 J/gºC; Specific Heat of water = 4.184 J/gºC; and the Heat of fusion of ice = 334 J/g. Calculate the heat required to form liquid H2O up to 42°C. 221x104) 1.11 x 104) -2.21 x 104) -1.11 x 104)