Raquel stayed at McDonald's and ordered a cup of hot coffee. When the coffee was served at around 7:00AM, its temperature is 75 degree celsius. The temperature inside is maintained at 18 degree celsius. At around 7:15 AM, the temperature of the coffee dropped by 15 degrees. What is the temperature of the coffee at exactly 7:25 AM? If Raquel wants to drink the coffee when its temperature is 45 degree celsius, at what time will this happen?
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.
Raquel stayed at McDonald's and ordered a cup of hot coffee. When the coffee was served at around 7:00AM, its temperature is 75 degree celsius. The temperature inside is maintained at 18 degree celsius. At around 7:15 AM, the temperature of the coffee dropped by 15 degrees. What is the temperature of the coffee at exactly 7:25 AM? If Raquel wants to drink the coffee when its temperature is 45 degree celsius, at what time will this happen?
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