Concept explainers
Interpretation:
Among the given options, the process that is not a physical change has to be chosen.
Concept Introduction:
In matter, changes are familiar and common occurrences. Similar to the properties of matter, changes in matter can also be classified as physical change and chemical change.
Process in which, the physical appearance of the substance changes but not the chemical composition is known as physical change. Some of the examples are melting, freezing, evaporation etc.
Process in which, the chemical composition of the substance changes is known as chemical change. All
Trending nowThis is a popular solution!
Chapter 1 Solutions
Bundle: General, Organic, and Biological Chemistry, 7th + OWLv2 Quick Prep for General Chemistry, 4 terms (24 months) Printed Access Card
- Exercise 2: C₂ Calculate the difference between the heat of reaction at constant volume and the heat of reaction at constant pressure in the following two cases : 0°0 a) at a temperature f C₂H50H ( +30 2697 - 2002099 +31₂0157 b) at a temperature of 25°C C2H50th 197 + 30% - 2009) + 3 H₂O (1) Please answer the following question step-wise showing. detailed explanations. Thanks in advanced !!! MS.arrow_forwardShown here is a representation of a closed container in which you have just placed 10 L of H2O. In our experiment, we are going to call this starting point in time t = 0 and assume that all of the H2O is in the liquid phase. We have represented a few of the H2O molecules in the water as dots. a Consider a time t = 1, at which some time has passed but the system has not reached equilibrium. i. How will the level of the liquid H2O compare to that at t = 0? ii. How will the vapor pressure in the flask compare to that at t = 0? iii. How will the number of H2O molecules in the vapor state compare to that at t = 0? iv. How does the rate of evaporation in this system compare to the rate of condensation? v. Draw a picture of the system at t = 1. b Consider a time t = 2, at which enough time has passed for the system to reach equilibrium. i. How will the level of the liquid H2O compare to that at t = 1? ii. How will the vapor pressure in the flask compare to that at t = 1? iii. How will the number of H2O molecules in the vapor state compare to that a t = 1? iv. How does the rate of evaporation in this system compare to the rate of condensation? v. Draw a picture of the system at t = 2.arrow_forwardPreference by scientists for metric system unit use is because a. more precise measurements result from their use b. metric unit interrelationships are mathematically simpler c. metric unit names are easier to spell d. no correct responsearrow_forward
- Consider the combustion (burning) of methane, CH4, in oxygen. CH4(g)+2O2(g)CO2(g)+2H2O(l) The heat of reaction at 77C and 1.00 atm is 885.5 kJ. What is the change in volume when 1.00 mol CH4 reacts with 2.00 mol O2? (You can ignore the volume of liquid water, which is insignificant compared with volumes of gases.) What is w for this change? Calculate U for the change indicated by the chemical equation.arrow_forwardIn which of the following pairs of properties are both physical properties? a. low density, flammable b. reacts with oxygen, does not react with iodine c. very brittle, very toxic d. no correct responsearrow_forwardExercise The volume of 1 mole of Helium (He) gas at different temperature values is given in the following table. Temperature (K) Volume of He(g) (L) 14.3 17.2 203 243 283 323 363 Plot the Volume of He(g) vs. temperature Q1) What is the value of the correlation coefficient R2? a.0.98980 b.0.99000 c.0.98990 23.1 25.9 31.5 d.0.98700 e.0.98704 Q2) What is the slope of the trendline? a.0.1078 b.0.1080 c.0.1077 d.0.1100 e.0.1081 Q3) What is the intercept of the trendline? a.-8.0900 b.-8.1000 c.8.0933 d.8.0900 e.- 8.0933 f.8.1000arrow_forward
- Selenium tetrafluoride, SeF4, is a colorless liquid. It has a vapor pressure of 757 mmHg at 105C and 522 mmHg at 95C. What is the heat of vaporization of selenium tetrafluoride?arrow_forwardEXERCISE 1. C + O2 → _CO 2. Mg + O2 → _MgO 3. H2O2 → H2O + O2 4. CH4 + O2 → CO2 + H2O 5. N205 → N2O4 +arrow_forwardCalculate the heat of vaporization, Hvap, of water, using standard enthalpies of formation (Table 6.2).arrow_forward
- Problem 17arrow_forwardTo what temperature must magnesium carbonate be heated to decompose it to MgO and CO2 at 1 atm? Is this higher or lower than the temperature required to decompose CaCO3? Values of Gf (in kJ/mol) are as follows: MgO(s), 601.2; MgCO3(s), 1111.7. Values of S (in J/K.) are as follows: MgO(s), 26.9; MgCO3(s), 65.9. Data for CO2 are given in Tables 6.2 and 18.1.arrow_forwardWhich of the following correctly orders the three types of naturally occurring radiation in terms of increasing ability to produce ion pairs through radiationmatter interactions? a. alpha, beta, gamma b. gamma, alpha, beta c. gamma, beta, alpha d. no correct responsearrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning