17 Questions
What is the specific heat capacity of water and glass cup, respectively?
4200 Jkg -1oC-1 and 840 Jkg -1oC-1
What is the amount of heat energy required to increase the temperature of 1 kg of substance X from 30°C to 70°C?
The amount of heat energy can be calculated using the formula Q = mcΔT, where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
What is the phase of the substance at point D in the graph?
Liquid
What is the total energy required to melt the whole of substance X?
The total energy required can be calculated from the graph of temperature versus energy, by finding the area under the curve during the phase change from solid to liquid.
What is the power of the heater if it takes 1 minute to increase the temperature of substance X from 30°C to 70°C?
The power of the heater can be calculated using the formula P = Q / t, where P is the power, Q is the heat energy, and t is the time.
If Block A is at 300°C, what is its temperature in Fahrenheit?
572°F
What is the definition of heat in terms of energy transfer?
Energy that is transferred from one body to another because of a difference in temperature
What is the SI unit for heat?
Joule (J)
What is the condition where there is no net flow of heat between two objects?
Thermal equilibrium
What is the formula for heat capacity (C)?
C = Q / Δθ
What determines the heat capacity of an object?
The quantity of substance in the object
What is the definition of temperature, and how does it relate to the heat energy of an object?
Temperature is a measure of the degree of hotness or coldness of a system. When an object is heated, it absorbs heat energy and its temperature increases. Conversely, when an object is cooled, it releases heat energy and its temperature decreases.
What is the difference between heat capacity and specific heat capacity?
Heat capacity is the amount of heat energy required to change the temperature of an object by 1°C, while specific heat capacity is the amount of heat energy required to change the temperature of 1 gram of a substance by 1°C.
What is the principle behind calorimetry, and how is it used to measure heat transfer?
Calorimetry is based on the principle of heat transfer from a system at a higher temperature to one at a lower temperature. It is used to measure heat transfer by measuring the temperature change of a calibrated object.
What is the difference between latent heat of fusion and latent heat of vaporization?
Latent heat of fusion is the energy required to change 1 gram of a substance from solid to liquid at its melting point, while latent heat of vaporization is the energy required to change 1 gram of a substance from liquid to gas at its boiling point.
How does the temperature of a system change during a phase transition, and what is the significance of the graph of temperature versus time?
During a phase transition, the temperature of a system remains constant, as the heat energy is used to change the phase of the substance. The graph of temperature versus time shows a plateau during the phase transition, indicating no change in temperature.
What is the significance of the graph of temperature versus energy, and how does it relate to energy conservation?
The graph of temperature versus energy shows the relationship between the internal energy of a system and its temperature. It illustrates the conservation of energy, as the total energy of an isolated system remains constant, but can be converted from one form to another.
Practice converting temperatures and learn about the definition and units of heat, thermal equilibrium, and heat transfer. Test your understanding of heat and temperature concepts.
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