In order to extract the maximum flavor in the shortest amount of time, your local fast food purveyor has decided to brew its coffee at 90.0 °C and serve it quickly so that it has only cooled down to 85.0 °C. While this may be economically sensible, it is negligent and dangerous from a health and safety standpoint. Water (which is what coffee mostly is) at 85.0 °C is hot enough to cause third-degree burns (the worst kind) in two to seven seconds. You add 0.0705 kg of ice -18.5 °C ice cubes to cool down the your 355 mL of coffee. What is the final temperature of your coffee? Final step: You have to set the energy gained by the ice to get up to the final temperature (left side of equation) equal to the energy lost by the coffee to get down to the final temperature (right side of equation). The specific heat of water (cwater) is
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.
In order to extract the maximum flavor in the shortest amount of time, your local fast food purveyor has decided to brew its coffee at 90.0 °C and serve it quickly so that it has only cooled down to 85.0 °C. While this may be economically sensible, it is negligent and dangerous from a health and safety standpoint. Water (which is what coffee mostly is) at 85.0 °C is hot enough to cause third-degree burns (the worst kind) in two to seven seconds. You add 0.0705 kg of ice -18.5 °C ice cubes to cool down the your 355 mL of coffee. What is the final temperature of your coffee?
Final step: You have to set the energy gained by the ice to get up to the final temperature (left side of equation) equal to the energy lost by the coffee to get down to the final temperature (right side of equation). The specific heat of water (cwater) is
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