If 100 g of water at 0°C is mixed with 100 g of water at 100°C, what will be the

Practice Questions

Q1
If 100 g of water at 0°C is mixed with 100 g of water at 100°C, what will be the final temperature?
  1. 50°C
  2. 25°C
  3. 75°C
  4. 0°C

Questions & Step-by-Step Solutions

If 100 g of water at 0°C is mixed with 100 g of water at 100°C, what will be the final temperature?
  • Step 1: Understand that we have two equal amounts of water: 100 g at 0°C and 100 g at 100°C.
  • Step 2: Recognize that when you mix equal masses of water at different temperatures, the heat lost by the hot water will equal the heat gained by the cold water.
  • Step 3: Since both amounts of water are the same (100 g), and they have the same specific heat capacity, they will balance each other out.
  • Step 4: Calculate the average of the two temperatures: (0°C + 100°C) / 2.
  • Step 5: The result of the calculation is 50°C, which is the final temperature of the mixture.
  • Heat Transfer – The process of thermal energy moving from a hotter object to a cooler one until thermal equilibrium is reached.
  • Specific Heat Capacity – The amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.
  • Thermal Equilibrium – The state in which two bodies in contact no longer transfer heat, resulting in a uniform temperature.
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