A student doing an experiment pours 0.500 kg of heated metal whose temperature is 98.0 oC into a 0.309 kg aluminum calorimeter cup containing 0.438 kg of water at 28.0 °C. The mixture (and the cup) comes to thermal equilibrium at 38.0 °C. The specific heat of the metal is ________ J/kg oC. (specific heat of aluminum = 900 J/kg oC, specific heat of water = 4186 J/kg oC)

In an experiment, a 125-g sample of an unknown metal is heated to 98.0°C. The metal is then placed into a 25.0-g aluminum calorimeter cup (with c = 900 J/kg.°C) containing 200-g of water at 20.0°C. When equilibrium is reached, the final temperature is 28.2°C. What is the specific heat of the unknown metal? %3D 637.2 J/kg-°C 673.7 J/kg.°C 679.9 J/kg.°C 788.5 J/kg.°C А. D. В. 808.0 J/kg.°C Е. С. 775.2 J/kg.°C F.

A 0.825 kg block of iron, with an average specific heat of 5.60 × 102 J/kg·K, is initially at a temperature of 254.0◦C. The block of iron is placed in a calorimeter with 16.4 g of water at 12.2◦C. What is the final thermal equilibrium temperature? If the answer if 100.0◦C, how much water is still in liquid form? Note: Treat the mass and heat capacity of the calorimeter as neglible.

A closed box is filled with dry ice at a temperature of -83.9 °C, while the outside temperature is 26.9 °C. The box is cubical, measuring 0.350 m on a side, and the thickness of the walls is 3.80 x 10-2 m. In one day, 3.35 x 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made. Number 30251.3 Units

A thermally isolated container has 479 grams of water in it and a 376 gram plastic block. The water had an initial temperature of 352 K. The plastic had an initial temperature of 300 K. The plastic and water reach an equilibrium temperature of 342 K. Water has a specific heat of 4.182 J/(gram K). What is the specific heat of the plastic block in J/(gram K)?

A sealed container holding 0.492 kg of liquid nitrogen at its boiling point of 77.3 K is placed in a large room at 23.2°C. Energy is transferred from the room to the nitrogen as the liquid nitrogen boils into a gas and then warms to the room's temperature. Liquid nitrogen has a latent heat of vaporization of 2.01 ✕ 105 J/kg. The specific heat of N2 gas at constant pressure is  cN2 = 1.04 ✕ 103 J/kg. K (a) Assuming the room's temperature remains essentially unchanged at 23.2°C, calculate the energy (in J) transferred from the room to the nitrogen. (b) Estimate the change in entropy of the room (in J/K).

A Styrofoam box has a surface area of 0.88 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, and the outside temperature is 24°C. If it takes 7.9 h for 5.0 kg of ice to melt in the container, determine the thermal conductivity of the Styrofoam. (Assume the ice is at a temperature of 0°C.) _________________ W/m · °C

An artist working on a piece of metal in his forging studio plunges the hot metal into oil in order to harden it. The metal piece has a mass of 62 kg and its specific heat is 0.1027 kcal/(kg · °C). He uses 810 kg of oil at 35°C. The specific heat of oil is 0.7167 kcal/(kg · °C). Once the metal is immersed in the oil, the temperature reaches an equilibrium value of 38°C. How hot was the forged metal piece just before he plunged it into the oil?

A 0.200-kg mass of metal with a specific heat of 1255.8 J/kg-°C, initially at 90°C, is placed in a 0.500-kg calorimeter, with a specific heat of 418.6 J/kg-°C, initially at 20°C. The calorimeter is filled with 0.100 kg of water, initially at 20°C. The specific heat of water is 4186 J/kg-°C. What is the final temperature once the combination of metal, calorimeter, and water reach equilibrium? O 70°C 40°C 60°C O 50°C

0.0550 kg piece of glass is heated to an unknown temperature and dropped into a calorimeter containing 0.150 kg of water at 12.0 °C. The glass and the water reach a final temperature of 18.0 °C. What is the initial temperature of the glass?