1 2 3 Test Yourselfochromicosed to.Multiple Choice. Choose the letter that corresponds to the correct answer.Which of the following physical processes is exothermic?boiling of waterA." shirts,rface of1.evaporation of alcoholcondensation of water vaporitems.C.a.d.b.melting of iceAn aqueous solution becomes cold when a solid is dissolved in the water. What does thedecrease in temperature imply?2.The solid is insoluble.The process is exothermic.с.a.d.The process is endothermic.b.The solid releases heat.Which of the following will be the best conductor of heat?aluminum (c=0.900 J/g.°C)3.lead (c=0.160 J/g.°C)C.a,d.magnesium (c=1.020 J/g-°C)copper (c=0.385 J/g.°C)Electrolysis dissociates liquid water molecules into hydrogen and oxygen gases with the useof electricity. Which thermochemical equation represents the reaction?H(g) + 0,(g) H,O()b.4.AH=-285.8 kJ/mola.AH= 571.6 kJ/molAH= 285.8 kJ/molAH=571.6 kJ/molb.2H,(g) + 0,(g) 2H,0()H,Og) →H(g) + 0,(g)с.d.2H,O() → 2H,(g) + 0,(g)Nitrogen dioxide (NO,) is cooled to produce dinitrogen tetroxide (N,O,). Which thermo-chemical equation represents the reverse reaction?5.AH? of NO,=33.9 kJ/molAH? of N,O,=9.2 kJ/molN,O.(g)- 2NO,(3)AH=24.7 kJ/mola.AH=58,6 kJ/molAH=-24.7 kJ/molb.N,0,(g)→ 2NO,(g)2NO,(g)N,O,()с.d.2NO,(g) → N,O,(g)AH=-58,6 kJ/mol6.How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to35°C?4.18 Jс.3375 Ja.3027 Jd. 6054 Jb.7.How much heat is absorbed by 750 grams of water as it is heated from 25.0°C to 96.0°C?223 kJс.53 kJa.d. 301 kJb. 72 kJChapter 3 Energy in Transit 71

Introduction : Endothermic reactions are those reactions which consumes energy in the form of heat,…

A. Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water 1. a. evaporation of alcohol condensation of water vapor C. b. melting of ice d. 2. An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? a. The solid is insoluble. The process is exothermic. C. b. The solid releases heat. The process is endothermic. d. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) a. с. lead (c 0.160 J/g.°C) b. copper (c=0.385 J/g.°C) d. magnesium (c= 1.020 J/g-°C) 3.

A. Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water 1. a. evaporation of alcohol condensation of water vapor C. b. melting of ice d. 2. An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? a. The solid is insoluble. The process is exothermic. C. b. The solid releases heat. The process is endothermic. d. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) a. с. lead (c 0.160 J/g.°C) b. copper (c=0.385 J/g.°C) d. magnesium (c= 1.020 J/g-°C) 3.

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter12: States Of Matter

Section: Chapter Questions

Problem 96A

See similar textbooks

Similar questions

ITEMS USED FOR EXPERIMENT: •Ring stand •Hot plate •125 mL Erlenmeyer flask•400 mL beaker•10 mL graduated cylinder •Aluminum foil•Rubberband•Paper Clip•Thermometer•Vial containing unknown liquid You know have the following data: Mass of flask + foil + rubberband: 78.637 gMass of flask + foil and rubberband+ unknown condensed liquid: 78.847 gTemperature of water bath: 100C = 373 KPressure of gas in our system: 29.02 inHg = 0.9699 atmVolume of gas in our system: 141 mL = 0.141 L 1. During the experiment, you collect the following data: Mass of flask: 80.001 g Mass of flask + unknown condensed liquid: 80.452 g Temperature of water bath: 100 °C Pressure of gas in our system: 0.998 atm Volume of gas in our system: 265 mL Which of the following number(s) need a conversion before they can be used? (Check all that apply) [ ] Group of answer choices [ ] Volume of gas in our system [ ] Mass of flask [ ] Temperature of water bath [ ] Pressure of gas in our system [ ] Mass of flask +…
1. What is the purpose of stirring the contents of thecalorimeter before the final temperature is taken?
12. The following question is from a practice website. It is shown in the photo below.
Calculate the percentage of water in potassium sulfate tetrahydrate. All final answers = SN (when applicable), SF & Units.
A student was given an unknown hydrate, which could be one of threepossibilities: magnesium sulfate heptahydrate, sodium dichromate tetrahydrate orbarium chloride dihydrate. Using the following data identify the unknown.Wt. of crucible/lid empty 39.46 gWt. of crucible/lid/hydrate sample 46.84 gWt. of crucible/lid/sample after heating 45.77 g
50g of nitrogen (N2) has a volume of ___ liters at STP. Show the complete solution a. V=49.0L b. V=40.0L c. V=44.9L d. V=47.70L
A company has just patented a new synthetic alcohol for alcohol beverages. You analyse asample of the new product by placing a small volume of it in a round-bottomed flask with avolume of 612.0 mL and an evacuated mass of 131.918 g. You submerge the flask in a waterbath at 100°C and allow the volatile liquid to vaporize. You then cap the flask and remove itfrom the water bath. You weight it and determine the mass of the vapour in the flask to be0.9198 g. what is the molar mass of the volatile liquid, and what does it mean with regard tothe new product? (Assume the pressure is 1 atm)
what as the weight percent of water in the hydrate before heating? Put answer in one decimal place. weight of water: 0.541 weight of hydrate: 2.041
kindly help me with this problem solve as neatly as possible and show completesolution. Round your final answer to 4 decimal places and box / highlight all final answers. all values must include proper units with properconversion if needed in your solution. Please follow the format Given,Required,Solution thank you! 1. The following data were taken in measuring the molecular weight of a certain gas by theRegnault’s Method: o Wt of evacuated bulb : 32.5050 go Wt of bulb+gas : 33.5417 go Wt of bulb+water : 385.31 go Temperature : 25 OCo P : 760 mm HgFind the Molecular Weight of the gas. What could have been this gas?
Heat of fusion.. Answer in man, 3 sig figs
The natural gas is required to be cooled to -162°C at atmospheric pressure
In Henry s law，what is Cg ’s unit？isn‘ it true that C represent mol/L，why does Cg unit keep change from gram to M？？？ I am so confused