RESET 17 18 19 Lab Data Mass of magnesium (g) Moles of magnesium (mol) Temperature of water (°C) Temperature of water (K) Vapor pressure of water (mmHg) Barometric pressure (mmHg) Observations Volume of hydrogen gas collected (mL) Volume of hydrogen gas collected (L) Pressure of hydrogen gas (mmHg) Pressure of hydrogen gas (atm) Moles of hydrogen gas produced (mol) Ideal gas constant (L-atm-mol¹-K¹) How to calculate ideal gas constant 0.018 0.00074 22.0 295.15 19.8 774 HOW SHIT X Water Vapor Pressure Table 2 3 4 5 6 7 8 PHASE 6: Collecting hydrogen gas over water Complete the following steps: Invert eudiometer into beaker of water Observe reaction. Record your observations in Lab Data At reaction's completion, equalize liquid heights. Zoom in on eudiometer and use up/down arrow to raise or lower eudiometer Measure volume of hydrogen gas. Record in Lab Data Calculate pressure of hydrogen gas produced in mmHg. Record in Lab Data Convert pressure of hydrogen gas produced to atm. Record in Lab Data Calculate moles of hydrogen gas produced. Record in Lab Data Calculate ideal gas constant, R, in units of L-atm-mol¹.K¹. Record in Lab Data

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.