Question

need help

For All Calculations Show Working: elp. Chemical 2. Calculate the work in L • atm and joules associated with the expansion of a gas in a cylinder from 67 L to 105 L at a constant external pressure of 24 atm. (Note: 1 L • atm = 101.32 J) 4. What amount of heat, in joules, is required to increase the temperature of 75.0 g of water from 22.3°C to 36.1°C? The specific heat of water is 4.184J/gºC.

Answer 1

@ Grillen Initial Volume , V = 674 Final volume , v2= 105L External pressure, Pesat = 24 aum work done =-Pext (V2-V,) = -24 atm ( 105-67) 3-912 Latm J Guien IL atm = 101.32J Hence, 912 Latm = 101.32 X 912 = -92403.845 tience work done in Joules=-92403.847 work done in Latm = -912 Latm where tve) sign shows work is I done by the system.

JU SH= mcp dt where m= Cp mass specific Heat capacity at - constant Pressure = change in Temperature - Heat required dt CH Given, mass of water - 759 =m gnitial Temperature, T = 22.3°C Final Temperature, T2 = 36.7°C dt, change in temperature , Tz-T=36-1-22.3)°c = 13.-8 °C (p= 4.184 5/9°C 750 x 4.164 J x 13.8°C tience, AHF 4330.440