1. A student investigates the enthalpy of solution, AH coln, for two alkali metal halides, LiCl and NaCl. In addition to the salts, the student has access to a calorimeter, a balance with a precision of +0.1 g, and a thermometer with
a precision of +0.1°C.
(a) To measure ΔΗ,
Isoln for LiCl, the student adds 100.0 g of water initially at 15.0°C to a calorimeter and adds
10.0 g of LiCl(s), stirring to dissolve. After the LiCl dissolves completely, the maximum temperature
reached by the solution is 35.6°C.
(i) Calculate the magnitude of the heat absorbed by the solution during the dissolution process, assuming
that the specific heat capacity of the solution is 4.18 J/(g•°C). Include units with your answer.
(ii) Determine the value of AH soln for Lici in kJ/mol. com

Lem 2 the data below are for the system ethyl propyl ether (1)-chloroform (2) at 0.5 bar. use the data to answer the following questions (all questions refer to p d 0: 5 bar). a) what are the boiling points of the pure components at 0.5 bar? b) a mixture with the overall composition z1 d 0: 1 is brought to 47.6ä±c, 0.5 bar. what is the phase? c) 100 mole of a mixture with z1 d 0: 1 (state a) is mixed with 22 mole of pure ethyl propyl ether vapor (state b). the mixing takes place at 47.6 ä±c, 0.5. bar. what is the phase of the resulting mixture (state c)? if the state is a v/l mixture report the number of moles and mole fractions in each phase. d) plot the txy graph and show states a, b and c. the graph must be done by computer and should be properly annotated. ethyl propyl ether (1) - chloroform (2) at 0.5 bar t ( ä±c) x1 y1 t ( ä±c) x1 y1 42.9 0.000 0.000 49.0 0.470 0.455 43.0 0.020 0.010 49.1 0.520 0.520 43.9 0.065 0.029 48.9 0.567 0.592 45.4 0.156 0.089 48.3 0.652 0.720 46.4 0.215 0.142 47.6 0.745 0.815 47.6 0.296 0.223 46.7 0.822 0.872 48.3 0.362 0.302 45.7 0.907 0.937 48.7 0.410 0.375 44.6 1.000

How many atoms are there in 5.70 mol of mg

What happens to isotopes that are unstable?