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 precaution Precautions sedimentary ammonia is caustic and hydrochloric acid is very corrosive. unceasingly wear upon your goggles. Procedure for part 1: Heat cogency of Joulimeter spend a penny a coffee cup calorimeter using a beaker of four hundred ml capacity, haul nested styrofoam cups, a cardboard contend, and a digital thermometer. Measure 50.0 ml of distilled weewee and pour this into the alter national cup of the joulimeter. come out the cardboard cover in engineer and insert the thermometer try through the lid being on the alert non to puncture the inner styrofoam cup. Measure a indorsement 50 ml portion of distilled irrigate and pour this into a dry 250 ml beaker. Heat this to 35-40 degrees celsius. Remove the beaker from the juicy scale of cadence and let the sample stand for about 2 minutes. riffle 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 transpose water.

Now begin recording the temperatures of the cool water in the joulimeter and of the substantial water in the beaker while gently breathing in the water samples with your thermometers. While recording temperatures with the two thermometers, remove the lids from the joulimeter and beaker of impassioned water. quickly pour the warm water into the cooler water in the coffee cup joulimeter without splashing. Replace the c! ardboard cover and the thermometer on the Joulimter. While gently stirring the contents of the Joulimeter, be on to record the temperatures associated with the intent 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 rouse exchange between the hot and cold water which is and then used to determine the heat capacity of the Joulimeter. This...If you want to perplex a bead on a full essay, put it on our website: BestEssayCheap.com

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