(a) How much heat transfer (in kJ) is necessary to raise the temperature of a 0.150 kg piece of ice from -16.0°C to 134°C, including the energy needed for phase changes? (Assume the substance remains at a constant volume throughout each stage of the heating process.) kJ (b) How much time (in s) is required for each stage, assuming a constant 21.5 kJ/s rate of heat transfer? (Enter your answers as a comma-separated list. Enter your times in order from the earliest stage to the final stage of the heating process.) t = (c) Make a graph of temperature versus time for this process. T°C) 140- T C) 140- 120 120 100 100 80 80 60 60 40 40 20 20 t (s) t (s) 10 15 20 10 15 20 T°C) 140- 120 100 T( C) 140- 120 100 80 80 60 40 60 40 20 20
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.
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