1. A (5.0x10^0) liter bottle is filled with nitrogen (N2) at STP (Standard Temperature and Pressure is 1 atm and 273 K) and closed tight. If the temperature is raised to 100 C, what will be the new pressure in SI units to two significant figures.
2. Consider air atP = 1.00 atm. The average molecular mass of air is approximately 29 u (atomic unit). Boltzmann constant is 1.380 10²³ J/K. What is the mass density in kg/m³ of air at T = (2.76x10^1)C? Use three significant digits for your answer.
3. A (5.00x10^0) liter bottle is filled with nitrogen (N2) at STP and closed tight. (STP means "Standard Temperature and Pressure" , i.e. 273 K and 1 atm.). To three significant figures, how many molecules of N2 are there?
4. An ideal gas, at pressure 3.7 atmospheres, in a volume 1.4 m³ and at a temperature of 292 K, is compressed into a lower volume 0.37 m³, at a pressure of 6.32 atmospheres. What is the new temperature, in K with two digits of precision?
5. The George Washington Bridge crosses the Hudson River between New York and New Jersey. The span of the steel bridge is about 1.90 km. What might be the difference in meters between the maximum span and minimum span over the course of a year, if the temperature can vary from a low of (4.0x10^0)C in winter to a high of 42C in summer? Expansion coefficient of steel is = 12.0 10⁶K¹. Use two significant figures in your answer.