Solve the following problems. 1. How many Joules of heat are given off when 5.0 g of water cool from 75°C
to 25°C? (Specific heat of water = 4.18 J/g*C)
2. How many calories are given off by the water in Problem 1?
(Specific heat of water = 10 col/gC)
3. How many joules does it take to melt 35 g of ice at 0°C? Cheat of fusion - 333 )
4. How many calories are given off when 85 g of steam condense to liquid water?
Theot of vaporization - 539.4 col/a)
5. How many joules of heat ore necemory to raise the temperature of 25 g of water
from 10°C to 60°C?
6. How many calories are given off when 50 g of water at ofreezes?
theat of fusion = 79 72 collo)

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole