2. You pump your air mattress to its maximum pressure during the day. You awaken from the pain of a rock sticking in your side. The mattress seems to have deflated even though no gas actually, leaked out. During the night the temperature at the campground drops 20°C from the temperature during the day. Use the kinetic theory to explain what has happened.

You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at 50 °C is put into an evacuated flask and heated at a constant rate until 10.0 kJ/mol of heat has been added to the sample. Graph the temperature of the sample that would be observed during this experiment. temperature (°C) 150- 140- 130- 120- 110- 100 90 80- 70- 60 50 0 heat added (kJ/mol) 10. X

Answer number 17 to 19 pls. I don't  want to waste my money here.

80 60 Temperature (°C) 40 20 -20 -40 10 20 30 Time (min) What is happening withthe substance when the line on the graph is flat? The temperature and the energy are held constant while the state of the substance changes. O Only the energy is held constant while the temperature increases. The temperature is held constant while the energy is being used to change the state of the substance. O The substance is at absolute zero.

An electric heater supplies 43.3 joules of energy to 27.3-g sample of H2 gas originally at 27.6 °C. Compute the final temperature (in °C). i °C

DATA : Mass of Magnesium (g) 0.0525 g Volume of hydrogen gas (mL) 50.0 mL Temperature of hydrogen gas (°C) 25.0°C Atmospheric Pressure (mmHg) 762 mm Hg Vapor pressure of water (mmHg) Partial pressure of hydrogen (mmHg) DATA ANALYSIS