Lab Write Up

Enthalpy Changes for Chemical Systems Ben Skiba Special Supplies/Equipment Styrofoam forms(2) Cardboard elevation(2) Digital thermometer(2) Reagents 3 molar NH3 3 molar HCL Ammonium chloride(NH4Cl) solid rubber eraser Precautions sedimentary ammonia is caustic and hydrochloric acid is very corrosive. invariably wear upon your goggles. Procedure for part 1: Heat efficiency of Joulimeter spend a penny a coffee cup calorimeter using a beaker of four hundred ml capacity, shlep nested styrofoam cups, a cardboard ascertain, and a digital thermometer. Measure 50.0 ml of distilled weewee and pour this into the run dry national cup of the joulimeter. puke the cardboard cover in engineer and insert the thermometer essay through the lid being on the alert not to puncture the inner styrofoam cup. Measure a indorsement 50 ml portion of distilled piddle and pour this into a dry 250 ml beaker. Heat this to 35-40 degrees celsius. Remove the beaker from the juicy scale of mensuration and let the sample stand for about 2 minutes. buckle the second thermometer prove through the cardboard cover, adjust it so that it does not contact the bottom of the beaker holding the sample of transfigure water. Now begin recording the temperatures of the cool water in the joulimeter and of the substantial water in the beaker while gently inhalant the water samples with your thermometers. While recording temperatures with the two thermometers, remove the lids from the joulimeter and beaker of raw water. quickly pour the warm water into the cooler water in the coffee cup joulimeter without splashing. Replace the cardboard cover and the thermometer on the Joulimter. While gently stirring the contents of the Joulimeter, improvement to record the temperatures associated with the longing water, cold water, and the temperature associated with the instantaneous mixing of the hot and cold water. These temperature measurements are indeed used to determine the rage exchange betwe! en the hot and cold water which is so used to determine the heat capacity of the Joulimeter. This...If you want to crawfish a bead on a full essay, army it on our website: BestEssayCheap.com

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