A quantity of steam at 100oC condenses to water at the same temperature by releasing 6.9 x 104J of energy. Calculate the mass of the condensed steam. [specific latent heat of vaporization of eater = 2.3 x 106 J kg-1]
A
3.0 x 10-1 kg
B
3.0 x 10-2 kg
C
3.0 x 10-3 kg
D
3.0 x 10-4 kg
Verified Correct Answer: B.
Physical Principles & Numerical Solution
M = \(\frac{Q}{T} = \frac{6.9 \times 10^{4}}{2.3 \times 10^6} = 3 \times 10^{-2} kg\)
Source: Myschool Past Questions Archive (Record #34664)