You are watching a new bridge being built near notice during the constructi that two concrete spans of the bridge of total length , 280 m are placed end to end so that no reom is alloved for expansion (figure (a)). In the opening storyline for the thermodynamics chapter. we talked about buckling sidewalks. The same thing will happen with spans on bridges if allowance is not made for expansion (figure (b)). You want to warn the construction crew about this dangerous situation, so you calculate the height y to which the spans will rise when they buckle in response to a temperature increase of AT- 21.0°C. T+AT

1) The nickel alloy materials using on the hot section of a jet engine can withstand temperatures of up to 1100 °C (2012 °F or 1373 K) if you add a ceramic coating that number goes up to 1300 °C (2372 °F or 1573 K). Assuming an ideal carnot efficiency in both cases, what is the increase of efficiency from no coating to coating. (Assume Ambient Temperature Exhaust gases to be 25 °C or 298 K)

A balloon holding 4.50 moles of oxygen (0,) gas absorbs 935 J of thermal energy while doing 112 J of work expanding to a larger volume. HINT (a) Apply the first law of thermodynamics. (b) Recall that the molar specific heat at constant volume, C, takes different values depending on whether the gas is monatomic or diatomic. Click the hint button again to remove this hint. (a) Find the change in the balloon's internal energy (in J). (b) Calculate the change in temperature of the gas (in K). K

An ideal gas of 5 degrees of freedom expands isothermically at an initial pressure of 10 atm and at a temperature of -23 degrees Celsius from a volume of 25000 L to a  volume of 75000L How many miles of gas are present ? What is the pressure after expansion? How much work was being done by the gas in this expansion?