Thermal Equilibrium Video Lessons

Concept:

# Problem: A piece of iron of mass 200 g and temperature 300°C is dropped into 1.00 kg of water of temperature 20°C. Predict the final equilibrium temperature of the water. (Take c for iron as 450 Jkg−1K−1 and for water as 4200 Jkg−1K−1)

###### FREE Expert Solution

Establish the equation for the heat transferred from the iron to water. Recall that Final temperature (equilibrium temperature) will be the same for water and iron.

Step 1. Establish the heat transfer equation

• The iron contains the heat (Q), meaning it will be releasing heat once placed to a colder temperature. The sign for the heat will be negative (-Q)
• Water on the other hand will be absorbing this heat. This makes water as heat absorbent. The sign for heat will be positive (+Q)
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###### Problem Details

A piece of iron of mass 200 g and temperature 300°C is dropped into 1.00 kg of water of temperature 20°C. Predict the final equilibrium temperature of the water. (Take c for iron as 450 Jkg−1K−1 and for water as 4200 Jkg−1K−1)