I need help solving these. I don’t know what formula to use for them. There’s the (Boyle’s law, Kevin’s law, Charles law, and s law). Can someone help me figure out which law I’m supposed to use?

Question

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1. A sample of gas occupies 33 mL at -101 Celsius what volume does the sample occupy at 97 Celsius?

2. There is a balloon that contains 2125 L of gas at 55 Celsius and 99 kPa. This balloon rises to an altitude where the pressure is 42kPa and the temperature is 12 Celsius. Calculate the volume of the balloon under these new conditions.

Answer 1

1. Poor question. What pressure? or is it at constant pressure (Charles law).? If you assume constant pressure, then change temps to kelvins, and V1/V2=T1/V2

2. pressure changes, temp changes, and volume changes. Gay-Lussac's law (or the ideal gas law). change temps to kelvins,

PV=nRT or numbermoles=PV/RT . Now because the number of moles is constant..

P2*V2/T2=P1*V1/T1

Answer 2

Thank you