Please help me! How much energy is released when125 grams of molten iron solidifies?
To determine the amount of energy released when 125 grams of molten iron solidifies, we need to know the heat of fusion for iron. The heat of fusion (or specific heat of fusion) is the amount of heat energy required to convert a substance from its liquid phase to its solid phase at a constant temperature.
In the case of iron, the heat of fusion is approximately 272 J/g. This means that for every gram of molten iron that solidifies, 272 Joules of energy are released.
To calculate the amount of energy released when 125 grams of molten iron solidifies, we can use the following formula:
Energy released = mass of iron (in grams) * heat of fusion
Substituting the given values:
Energy released = 125 g * 272 J/g
Now, we can calculate the energy released:
Energy released = 34,000 J
Therefore, when 125 grams of molten iron solidifies, approximately 34,000 Joules of energy are released.