Calculate the energy needed to change 200.0 g of water from 50.0 ° C to steam at 110.0 °C.
A). 119.0 kcal
B). 118.9 kcal
C). 10.9 kcal
D). 119,000 kcal

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.