An unknown substance has a mass of 0.125 kg and an initial temperature of 94.5°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 25.5 C. The mass of the aluminum container is 0.150 kg, and the temperature of the calorimeter increases to a final equlibrium.temperature of 32.0°C. Assuming no thermal energy is transferred to the environment, calculate the specific heat of the unknown substance. 3/kg - °C

An unknown substance has a mass of 0.125 kg and an initial temperature of 90.0°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 21.5°C. The mass of the aluminum container is 0.150 kg, and the temperature of the calorimeter increases to a final equilibrium temperature of 32.0°C. Assuming no thermal energy is transferred to the environment, calculate the specific heat of the unknown substance.

21.0 g of copper pellets are removed from a 300C oven and immediately dropped into 70.0 mL of water at 17.0C in an insulated cup. copper = 385 (J/kg K) water = 4190 (J/kg K) What will the new water temperature be? Express your answer with the appropriate units.

You drop an ice cube into an insulated container full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 60.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 850 g and an initial temperature of 30.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the container, or to the environment.)

A coffee cup calorimeter contains 151.36 g of water at 22.50 °C. A 65.837 g piece of iron is heated to 100.78 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 J and the g-K specific heat capacity of water is 4.184 . How much heat, q, is lost by the piece of iron? giron = J Enter numeric value How much heat, q, is gained by the water? 9water = J The difference between the heat lost by the piece of iron and the heat gained by the water is due to heat transfer to the styrofoam and the heat required to raise the temperature of the calorimeter. What is the heat capacity of the styrofoam calorimeter in joules per kelvin () ? J Ccalorimeter K What would be the final temperature of the system if all of the heat lost by the iron was absorbed by the water? Tinal °C

During a marathon race David uses energy at a rate of 292 W. What volume of body fluid does he lose in the 5.5 hours of the race if 17.0% of the energy goes to the muscle tissue and the rest is used in removing the perspiration from the body. The latent heat of vaporization is 2.41*10^6 J/kg at 37.0°C and density of water is 1000 kg/m3. Answer in cubic meters.

You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 90.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 850 g and an initial temperature of 22.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the flask, or to the environment.)  °C

What must be the speed of a lead bullet if it melts when it strikes a steel slab? The initial temperature of the bullet is 27 °C. The melting point of lead is 327 °C, its latent heat of melting is 21 kJ/kg and its specific heat capacity is 126 J/kg°C. Assume that all kinetic energy is converted to heat in the bullet.

314.0 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 299.0 K. How much heat in kilojoules must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg•K, the heat of fusion for copper is 205 kJ/kg, and its melting point is 1357 K.)

A block of iron (c=448.00 J/kj°C) initially at temperature 6.00°C is dropped into an insulated container filled with 15.71kg of water ( cwater=4186.00 J/kg°C) at 93.00°C. They come to equilibrium at a final temperature of 39.00°C. Determine the mass of the iron block. _____kg Determine the magnitude of thermal energy Q transferred between the two substances. ______kJ