How much energy is required to convert 50.0 g of water at 100°C to 50.0 g of steam at 100°C?

a) ΔH = q = 0 (no energy required)
b) ΔH = q = m × ΔT (use specific heat of water)
c) ΔH = q = m × L (use heat of vaporization of water)
d) ΔH = q = m × c × ΔT (use specific heat of steam)