how much heat is needed to melt 25.4 grams of iodine at its melting point?(Hfusion+61.7J/g)
q = mass I2 x heat fusion.
To calculate the amount of heat needed to melt the given mass of iodine, you can use the equation:
Q = m × Hfusion
Where:
Q is the heat required (in joules)
m is the mass of iodine (in grams)
Hfusion is the heat of fusion (in J/g)
Given:
m = 25.4 grams
Hfusion = 61.7 J/g
Plugging in the values in the equation:
Q = 25.4 g × 61.7 J/g
Now, multiply the mass and the heat of fusion:
Q = 1565.18 J
Therefore, to melt 25.4 grams of iodine at its melting point, approximately 1565.18 joules of heat are needed.