Heat of a Solution

Part 1. Data Table mass of empty Styrofoam cup and lid mass of cup, lid and cool water temperature of cool water specific heat of water temperature of hot water mass of cup, lid and water mixture observed final temperature of mixture 11.355g 36-2439 4.184 Golfc 3. Percentage error of experiment. 88-0039 4760 Calculations (Carry out to the proper number of significant digits.) 1. Masses of hot water and cold water used. 2. Calculated final temperature of mixture. (Do not use your observed final temperature of mixture.)

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Experiment name: Heat of solution( KNO3 with H2O and Tris with HCl) in 6772 Calorimetric Thermometer. Q1: Purpose of experiment Q2: Theory

data required mass of aluminum ly) Initial temp. of aluminum ('() volume of water (ML) initial temp. of water (C) final temp. of water ('() density of water 1 9/mL) specific heat of water (/g.c) calorimeter constant (/°C). specific heat of aluminum. vale Calalate the percent error_ 16.27 83.85 50.6 20.30 73.90 1.00 4.184 22.44 ㅗ 9.'0 2 actral specific heat of Al is 0.900 J 9:0 7.

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Calorimetry of Metals Lab Set up a boiling water bath of 250 mL of water in a 400L beaker at 325 degrees C.  Placed a test tube of 13.88g of aluminum into boiling water.  Boiled for 20 minutes and reached a temp of 99.0 degrees C. Set up a "coffee-cup" calorimeter with a volume of 50mL of water.  Assume the water has a density of 0.997 g/mL.  Initial temp of 50mL of water is 22.2 degrees C.  Dumped the test tube of heated aluminum into calorimeter.  Final temp of 50mL of water is 26.4 degrees C.  Calculate the specific heat of the aluminum.  Use the specific heat of water as 4.184 J/g*degrees C.

How many CAL must be added to heat 399.9 g of water from -20.0oC to 95.0 oC ? Don't do the calculation, just indicate which conversion factors would be used  Blank 1. Fill in the blank, read surrounding text. specific heat of the solid, 0.504 cal/goC  Blank 2. Fill in the blank, read surrounding text. specific heat of the liquid, 0.999 cal/goC  Blank 3. Fill in the blank, read surrounding text. specific heat of the gas, 0.497 cal/goC  Blank 4. Fill in the blank, read surrounding text. heat of fusion, 79.7 cal/g  Blank 5. Fill in the blank, read surrounding text. heat of vaporization, 539 cal/g a.  used           b.  not used

30 + BIUA nal text New Rocker Roland Morris Calorimetry Lab: Exchanging Energy Background: When 2 materials (at different temperatures) come in contact, there is a movement of energy from one to the other. The warmer object will lose energy and the cooler m terial wil gain that energy As a result, they will reach the same temperature (called equilibrium) since the TOTAL energy of the system has not changed, we can use our understanding of calorimetry to find the starting temperature of the hot object (using Q=mcAT) Research Question: If we are not able to directly measure the temperature of a hot object, can we use the conservation of energy to calculate the temperature when some of its heat is exchanged with an initially cooler object? Hypothesis: Materials: Safety Goggles Digital Scale Styrofoam Cup Beaker Tongs Water Steel Nut Propane Torch LabQuest with Temperature Probe Procedure: 1 Weigh the steel nut and record 2. Weigh the empty styrofoam cup and record 3. Weigh the styrofoam…

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Pre-laboratory Assignment: Calorimetry and Hess’s Law

Table 2. Specific heat of common metals Metals Copper Aluminum IV. V. Brass Steel Bronze Results and Discussion Specific Heat 0.0923 btu/ 16 °F 0.220 btu/ 16 °F 0.092 btu/ 16 °F 0.122 btu/ 16 °F 0.104 btu/ 16 °F What metal has the highest specific heat and why? What metal has the lowest specific heat and why? Conclusion What can you conclude about the specific heat of metals? What can you conclude about the result? (Ctrl) Paste Options: LA Keep Source Formatting (K)

TEXT ANSWER Question 13 A calorimeter holds 45 g water at 22.0°C. A sample of hot iron is added to the water, and the final temperature of the water and iron is 28.0°C. What is the change in enthalpy asso- ciated with the change in the water's temperature? J Note: The specific heat of water is 4.18 g°C. Use the formula AH = -cmAT Show your work. Normal ÷ A A √x Enter your answer here 中山 2 Tx BIUS X ||| |||

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4 / 8 100% DNOTE rhe avov 28) 28) Which statement is FALSE? A) Endothermic has a positive AH. B) AErxn is a measure of heat. C) An exothermic reaction gives off heat to the surroundings. D) Enthalpy is the sum of a system's internal energy and the product of pressure and volume. E) AHrxn is the heat of reaction. 29) Energy that is associated with the temperature of an object is called A) potential energy. C) kinetic energy. 29) B) thermal energy. D) chemical energy.

Part I: Specific Heat of a Known Metal Metal:  _______Cd________     Trial 1   Mass of metal   58.953  g   Mass of calorimeter   NA   g   Mass of calorimeter + water   NA   g   Mass of water   100.0  g   Initial temperature of metal (temperature of boiling water)   100.0 °C   Initial temperature of water in calorimeter   22.0 °C   Maximum temperature of metal and water from graph   23.0  °C   Temperature change of water ()   1.0 °C   Temperature change of metal ()   31.0  °C   Heat gained by water ()       ?    J   Specific heat of metal     ?    J/g°C     Atomic Mass of Metal: ________?_______g/mol   Note: Use this equation and your data:          Identity of Metal: ______?_____ ______________   Experimental error:     ____?__________________

During a(n)___________ process, the system gains energy from the surroundings. Group of answer choices endothermic. exothermic. thermodynamic. thermochemical. physical.

Solving Computation of specific heat for unkown metals. Trials 1 & 2

What is the average specific heat capacity of the unknown metal in this experiment? What is the unknown metal? Temp of metal: 97°C Temp of water: 22° C

Paraphrasing .ewriting Tool Car note Pirate Ship BLACKBOARD [Review Topics] [References) Calculate strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol H: H eclipsing 4.0 1.0 H: CH3 eclipsing 5.8 1.4 CH3 : CH3 eclipsing 11.0 2.6 gauche butane 3.8 0.9 cyclopropane 115 27.5 cyclobutane 110 26.3 cyclopentane 26.0 6.2 cycloheptane 26.2 6.3 cyclooctane 40.5 9.7 (Calculate your answer to the nearest 0.1 energy unit, and be sure to specify units, kJ/mol or kcal/mol. The answer is case sensitive.) Previous Ne: Sav FEB 1 étv 14 MacBook Air DII DD 11 888 F9 F10 F8 F7 F6 F5 F4 & 2$ 7 8. 4 Y U ト

A coffee-cup calorimeter contains 50 mL of water with an initial temperature of 24.8°C. An unknown sample with a mass of 1.972 grams was placed inside making the water temperature rise up to 25.5°C. The initial temperature of the metal was 98.3°C. 1. How much heat was absorbed (in J) by the water in the calorimeter?_________ (round off final answer to 2 decimal places)

Use the heat equation to calculate the energy or calories lost when (8.8x10^1) g of water cools from 45 °C to 25 °C. Report answer to correct sig figs and in scientific notation.

CD app.101edu.co I Brightspace Walmart - Hiring Ce.... # What is the specific heat of a 75.01 g piece of an unknown metal that exhibits a 45.2 °C temperature change upon absorbing 1870 J of heat? + t 4 O F3 3 E . F4 144 $ R F5 5 F6 P T A 6 Y F8 Question 5 of 12 & 7 F9 8 F10 1 ( K F11 PO O ) F12 P 7 +/-

For part A B & C do calculations and write the missing numbers in the tables