On a warm afternoon (26°C), James is making fruit punch while the ice is melting (0°C) in a bowl. Assume that the specific heat capacity of the punch is 2.7 x 103 J kg−1 °C−1 and of water is 4.2 x 103 J kg−1 °C−1. The latent heat of fusion of water is 3.34 x 105 J kg−1. I. Michelle, a friend of James, likes her punch served ice cold, at 0°C. What is the minimum mass ice cube she should select to cool her 60‐gram punch from 26°C to 0°C? II. James prefers his 60‐gram punch served at little warmer. What temperature will the drink be if he places a 6 g ice cube into his punch? III. Sanya, another friend, decides she wants a cup of tea. She uses 2000 W mains operated kettle filled with 1.20 kg of water at room tempe
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.
On a warm afternoon (26°C), James is making fruit punch while the ice is melting (0°C) in a bowl. Assume that the specific heat capacity of the punch is 2.7 x 103 J kg−1 °C−1 and of water is 4.2 x 103 J kg−1 °C−1. The latent heat of fusion of water is 3.34 x 105 J kg−1.
I. Michelle, a friend of James, likes her punch served ice cold, at 0°C. What is the minimum mass ice cube she should select to cool her 60‐gram punch from 26°C to 0°C?
II. James prefers his 60‐gram punch served at little warmer. What temperature will the drink be if he places a 6 g ice cube into his punch?
III. Sanya, another friend, decides she wants a cup of tea. She uses 2000 W mains operated kettle filled with 1.20 kg of water at room temperature (26°C). How long will she have to wait for the water to reach boiling point (100°C)?
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