7.5 g of ice at -15.0 Cis heated until it is steam at 115 C. How much heat is used in the whole process? Round to the nearest whole number

Self Test Solutions - A1 - Ch 10.indd - mypower-net.com

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c) volume 1 kg of dry saturated steam at 7000 kPa. In steam pressure table, ... Read 'vg' for 7000 kPa = 27.37 cm3/g = 0.027 m3/kg (Ans.) d) latent heat to totally evaporate 1 kg at 310°C. In steam ... Using the superheated steam tables, find the following properes at the stated condions: ... total enthalpy of 10 kg = 10 x 2801.4.

Explanation:

I hope I help?

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g