### Description

**A. Demonstration Experiment**

1. Boyle’s law–effect of pressure at constant temperature

Watch the following video for a demonstration of Boyle’s law.

Assume a set up was arranged as described on pages 123-124. Fill in the following on your report sheet:

Trial 1 | Trial 2 | |

First pressure(P_{1}) | 650 mm Hg | 650 mm Hg |

Second pressure (P_{2}) | 776 mm Hg | 538 mm Hg |

First volume(V_{1}) | 46.4 mL | 29.2 mL |

Second volume, measured | 39.1 mL | 35.2 mL |

Second volume, calculated (V_{2}) | calculate using Boyle’s Law | calculate using Boyle’s Law |

Percent error | determine on your own | determine on your own |

2. Charles’s law–effect of temperature at constant pressure

Watch the following video for a demonstration of Charles’ law.

Assume a set up was arranged as described in the video. Fill in the following on your report sheet:

First temperature (T_{1}) | 22.1 °C (calculate K temperature) |

Second temperature(T_{2}) | 95.2 °C (calculate K temperature) |

First volume (V_{1}) | 36.1 mL |

Second volume, measured, mL | 36.7 mL |

Second volume, calculated, mL (V_{2}) | calculate using Charles’ Law |

Percent error | determine on your own |

**B. Molar Mass of a Vapor**

Watch the following video for how this portion of the lab would look.

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