Liquid water is fed to a boiler at 24 c and 10 bar and is converted at constant pressure to saturated steam. calculate the heat input required to 3 produce 15,000 m /h of steam at the exiting conditions. assume that the kinetic energy of the entering liquid is negligible and that the steam is discharged through a 15-cm id pipe. (from steam tables: h (h, o) 24 с, 10 bar) kj/kg v (steam, 10 bar, saturated) = 0.1943 m /kg)) 100.6 kj/kg; h (steam, 10 bar, saturated) 2776.2 _ 3

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

there are two significant figures.