The heat of vaporization of water is 2.26 kJ/g. How much heat is needed to change 3.74 g of water to steam?
assuming that the water is already at boiling temperature:
Heat in = 2.26 KJ /g * 3.74 g = 8.45 KJ or 84,500 Joules
To find out how much heat is needed to change 3.74 g of water to steam, we can use the heat of vaporization of water and the given mass.
The heat of vaporization of water is given as 2.26 kJ/g.
To calculate the heat needed, we can use the formula:
Heat = mass × heat of vaporization
Substituting the values:
Heat = 3.74 g × 2.26 kJ/g
Calculating this:
Heat = 8.474 kJ
Therefore, 8.474 kJ of heat is needed to change 3.74 g of water to steam.