thanks ! A mass of 20 g of solid initially at -40 degree is heated at constant p

Question

thanks !

A mass of 20 g of solid initially at -40 degree is heated at constant pressure. The figure show. the graph of temperature vs. added heat (in kca!) from -30 degree Cto +60 degree C. What is the latent heat of vaporization? 2. A student uses a constant volume gas thermometer to attempt to determine absolute zero. Two data points are taken, A and B. us shown, and the student draws the line indicated in the figure. Which of the following statements must be true (assuming the values assigned to the temperatures are correct). The absolute temperature of an ideal gas is directly proportional to

Explanation / Answer

1) F)50 cal/g....Q = m*Lf ===>(2.5-1.5)*1000 = 0.02*Lf===>Lf = 50000 cal/kg or 50 cal/g...... 2) E) Both pressures measurement are wrong.... Because. the straight line is supposed to pass through -273.15 degrees celsius. 3) c)average kinetic energy. because, KE = (3/2)*n*R*T for monotomic gas

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