A mass m of steam at 130º C is used to warm 200 gm of water from 20º C to 50º C. Write an expression in terms of mass, m, for the heat lost by the steam as it cools to its boiling point. Write an expression in terms of mass, m, for the heat lost as the water condenses from the steam and then cools to the final equilibrium temperature of 50º C. Then calculate the amount of heat gained by the water, Q gained, raising its temperature from 20º C to 50º C and find the initial mass of the steam needed to complete this process as described.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
A mass m of steam at 130º C is used to warm 200 gm of water from 20º C to 50º C.
Write an expression in terms of mass, m, for the heat lost by the steam as it
cools to its boiling point. Write an expression in terms of mass, m, for the heat lost as the water
condenses from the steam and then cools to the final equilibrium temperature of
50º C. Then calculate the amount of heat gained by the water, Q gained, raising its
temperature from 20º C to 50º C and find the initial mass of the steam needed to complete this process as
described.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
