A square steel bar of side length w = 0.13 m has a thermal conductivity of k = 14 J/(s⋅m⋅°C) and is L = 2.1 m long. One end is placed near a blowtorch so that the temperature is T1 = 78° C while the other end rests on a block of ice so that the temperature is a constant T2. (a) Input an expression for the heat transferred to the cold end of the bar as a function of time, using A = w2 as the cross-sectional area of the bar. (b) How much energy, in joules, was conducted in 1 hour, assuming T2 = 0° C? (c) Input an expression for the mass of the water melted in 1 hour using Q1 from above and Lf the latent heat of fusion.
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 square steel bar of side length w = 0.13 m has a thermal conductivity of k = 14 J/(s⋅m⋅°C) and is L = 2.1 m long. One end is placed near a blowtorch so that the temperature is T1 = 78° C while the other end rests on a block of ice so that the temperature is a constant T2.
(a) Input an expression for the
(b) How much energy, in joules, was
(c) Input an expression for the mass of the water melted in 1 hour using Q1 from above and Lf the latent heat of fusion.
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