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A volume of 2.0 L of air at 37°C is expelled from the lungs into cold...

A volume of 2.0 L of air at 37°C is expelled from the lungs into cold surroundings at 1.3°C. What volume (in L) does the expelled air occupy at this temperature? The pressure  and the number of gas particles do not change?

The pressure inside a 1.0 L balloon at 25°C was 750 mm Hg. What is the pressure (in mmHg) inside the balloon when it is cooled to −58°C and expands to 3.2 L in volume?

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