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How could you modify the equipment to increase the rate of heat transfer from the hot cup to the cold cup?
make the calorimeter a metal bar
How is the average rate of heat transfer calculated?
when is heat transferred?
What can slow the movement of heat energy from a warmer object to a cooler object?
Transfer of heat can be slow down by increase insulation. For radiation heat transfer, colour coating could reduce rate of radiation in the same manner as insulation. Reduce surface area of heat transfer (or area of contact) can also reduce rate of heat transfer.
conclusion and recommendation of lab heat transfer of first law termodynamics?
Conclusion The lab experiment on heat transfer of first law thermodynamics has demonstrated that heat energy can be transferred from one body to another through conduction, convection, and radiation. The data collected in this experiment shows that the rate of heat transfer is determined by the thermal conductivity of the material, the surface area of the material, and the temperature difference between the materials. The results of the experiment suggest that the higher the thermal conductivity of the material, the greater the rate of heat transfer. In addition, the higher the temperature difference between the two materials, the more heat will be transferred. Furthermore, the larger the surface area of the material, the greater the rate of heat transfer. Recommendation This lab experiment has shown that heat transfer is a complex process and can be further explored by performing more experiments with different materials and different temperature differences. In addition, this experiment has shown that the factors which affect heat transfer, such as thermal conductivity and surface area, can be manipulated to increase or decrease the rate of heat transfer. Therefore, it is recommended that further experiments should be conducted in order to further understand how these factors interact to affect the rate of heat transfer. Additionally, it is recommended that experiments should be conducted to explore how different materials and different temperature differences affect the rate of heat transfer. Finally, it is recommended that experiments should be conducted to explore how different materials and different surface areas affect the rate of heat transfer.
Why do different materials heat up at different rate?
usually metals or conductors get the heat energy from the heat. the heat transfer the particles in the conductors which causes it to heat up in a faster rate to get it hot.
How does temperature affect the rate of heat transfer?
For conductive and convective heat transfer, the rate of heat transfer is proportional to the the temperature difference; if you double the difference you will double the rate of heat transfer. For radiative heat transfer, the rate of heat transfer is proportional to the difference of the 4th powers of the absolute temperatures.
What does an insulator do to the rate of heat transfer?
It reduces the rate of transfer.
How is the rate of a cooling of a building affected by the thickness and the thermal conductivity of its walls?
Generally thicker walls slow down the transfer of heat, and if the material is a good thermal conductor that will increase the rate of transfer.
What is the heat which travel molecule to molecule?
if you mean the transfer rate of heat ?; the heat transfer rate depends on the atom or molecule type .
How could you modify the equipment to increase the rate of heat transfer from the hot cup to the cold cup?
make the calorimeter a metal bar
How is the average rate of heat transfer calculated?
when is heat transferred?
How would bigger mass in the water affect the cooling rate?
Say you are cooling liquid A with water. The rate of heat transfer is given by Q = mH2OCpH2OdTH2O = mACpAdTA, where m is the mass, Cp is the mean heat capacity and dT is the change in temperature. So, if you increase m, the mass of water, Q increases (the rate of heat transfer increases) and hence the cooling rate would increase. And if m were to be decreased, the cooling rate would decrease. Strictly speaking, it should be the mass flowrate and not the mass that would be the parameter.
How can heat transfer be promoted?
Answer is within heat transfer equationconduction = (k.A.dT/x)dtConvection = (h.A.dT)dtRadiation = s.e.AdT4.dtIncrease of conductivity (k) or heat transfer coefficient (h) or area (A) or temperature difference (dT) or contact time (t) or emissivity (e) allow for higher amount of energy to transfer.Reduce of transfer distance (x) increase rate of energy transfer.Increase flow rate to boost convection heat transfer (fluid)Increase surface area of contact (solid - fluid)Design heat exchanger in counter current flow (fluid)Prolong retention time (higher contact time -> more heat can transfer)Change of heat transfer medium (better thermal conductor medium)Use of heat pump (promote higher temperature difference yield better heat transfer)Coat surface with black colour (higher emissivity promote radiation heat transfer)
What can slow the movement of heat energy from a warmer object to a cooler object?
Transfer of heat can be slow down by increase insulation. For radiation heat transfer, colour coating could reduce rate of radiation in the same manner as insulation. Reduce surface area of heat transfer (or area of contact) can also reduce rate of heat transfer.
What are the factors that can increase the rate at which a substance dissolves in water?
1. Surface area- increase to dissolve faster. 2. Agitation- shaking/stirring increases the rate. 3. Heat (temperature)- increase in heat mostly increase rate of dissolving.
conclusion and recommendation of lab heat transfer of first law termodynamics?
Conclusion The lab experiment on heat transfer of first law thermodynamics has demonstrated that heat energy can be transferred from one body to another through conduction, convection, and radiation. The data collected in this experiment shows that the rate of heat transfer is determined by the thermal conductivity of the material, the surface area of the material, and the temperature difference between the materials. The results of the experiment suggest that the higher the thermal conductivity of the material, the greater the rate of heat transfer. In addition, the higher the temperature difference between the two materials, the more heat will be transferred. Furthermore, the larger the surface area of the material, the greater the rate of heat transfer. Recommendation This lab experiment has shown that heat transfer is a complex process and can be further explored by performing more experiments with different materials and different temperature differences. In addition, this experiment has shown that the factors which affect heat transfer, such as thermal conductivity and surface area, can be manipulated to increase or decrease the rate of heat transfer. Therefore, it is recommended that further experiments should be conducted in order to further understand how these factors interact to affect the rate of heat transfer. Additionally, it is recommended that experiments should be conducted to explore how different materials and different temperature differences affect the rate of heat transfer. Finally, it is recommended that experiments should be conducted to explore how different materials and different surface areas affect the rate of heat transfer.
What affects the rate of heat transfer?
FACTORS AFFECTING HEAT TRANSFERTemperature Difference (.T ) between the two fluids - This is the driving force in heat exchange principles. The greater the .T, the greater the heat transfer rate .Fluid flow rate - Increasing flow rate will increase heat transfer rate.The nature of the heat conducting materials - Some materials have a high conductivity while others don't. This factor is 'built-in' in the design of the Exchanger and choice of materials. It is governed by the design engineers before manufacture.Surface area - The larger the surface area of the conducting interfaces, the greater the heat transfer rate.The surface area, again, is controlled by the design and manufacture of the exchanger. The more tubes contained in the bundle, the greater the surface area. The tube length will also affect heat transfer, as will the outside diameter and metal thickness of the tubes.
