I) AH>0 shows that reaction is an exothermic. II) Mole fraction of nitrogen (N2) in air is 0.21. III) If surrounding works on system then W is positive. IV) As temperature of a gas increases its volume decreases. V) The equation (V= an) represents an equation for the Avogadro’s law. VI) Ammonia burns in oxygen to form carbon dioxide and water.

I) AH>0 shows that reaction is an exothermic. II) Mole fraction of nitrogen (N2) in air is 0.21. III) If surrounding works on system then W is positive. IV) As temperature of a gas increases its volume decreases. V) The equation (V= an) represents an equation for the Avogadro’s law. VI) Ammonia burns in oxygen to form carbon dioxide and water.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

O 26 of 42 Constants Periodic Table Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant- volume (or "bomb") calorimeters. Part A A simple constant-pressure calorimeter can be made from a foam coffee cup and a thermometer; energy changes in a reaction are observed via a temperature change of the solution in the cup. Bomb calorimeters are used to measure A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 107 g of solution. The reaction caused the temperature of the solution to rise from 21.00 to 24,70 C. What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures. combustion and other…
Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 323. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that -162. kJ of work is done on the mixture during the reaction. Calculate the change in energy of the gas mixture during the reaction. Round your answer to 3 significant digits. Is the reaction exothermic or endothermic? kJ exothermic O endothermic x10 X 3
Here is the graph below pls answer the question. thanks The graphs in this experiment are for nitrogen gas, however, they do not have labels that identify the type of gas being represented. Would the curves for a more massive gas, such as CO2, look different? O No. The molar mass of a gas does not affect the shape of the kinetic energy distribution. O Yes, since CO2 has a larger molar mass, we'd expect the curve to shift towards left, indicating that a larger fraction of molecules have low kinetic energies. O Yes, since CO2 has a larger molar mass, we'd expect the distribution to shift towards the right, indicating a larger fraction of the molecules have high kinetic energies. Boltzmann energy distribution at 300.0 K and 500.0 K 0.0002 300.0 K 0.00015 0.0001 500.0 K 0.00005 so0 10000 15000 20000 25000 30000 35000 Kinetic energy 1/mol) Fraction per l/mol
The pressure of a gas is measured as 60. torr. Represent this pressure in atmospheres. (1 atm = 760 torr) Show work.
Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime (calcium oxide), which they produced by roasting limestone (calcium carbonate). 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO3) into solid calcium oxide and gaseous carbon dioxide. 2. Suppose 85.0L of carbon dioxide gas are produced by this reaction, at a temperature of 210.0°C and pressure of exactly 1atm. Calculate the mass of calcium carbonate that must have reacted. Be sure your answer has the correct number of significant digits.
The standard state of carbon is graphite. ΔH°f,diamond is +1.896 kJ/mol. Diamonds are normally weighed in units of carats, where 1 carat = 0.200 g Determine the standard enthalpy of the reaction for the conversion of a 3.61 -carat diamond into an equivalent mass of graphite.
9:17 Question 14.f of 40 In welding, the temperature of the flame produced by the combustion of acetylene and oxygen varies based on the balance of the two gases in the reaction. The heat is used to melt metal so that pieces of metal can be joined together. ..lLTE An oxidizing flame (excess oxygen) is used to cut through metal. The temperature of an oxidizing flame is typically around 6692 °F. What is this temperature in K? Report your answer to four significant figures. K 1 4 7 +/- Tap here or pull up for additional resources 2 3 5 6 8 9 O Submit X x 100
THERMOCHEMISTRY 237 23 3. A student wishes to determine the enthalpy of the reaction of hydrogen gas with chlorine gas by the reaction represented below. A high-pressure bomb calorimeter is used for this experiment. A 500.-mL high-pressure cell is filled with an equimolar mixture of H,(g) and CL,(g) to a total pressure of 10.00 atm and 293.50 K. H,(g) + CL(g) → 2 HCI(g) (a) If the reaction goes to completion, how many moles of HClI(g) can be produced? (b) The high-pressure sealed cell was placed in the bomb calorimeter and the mixture was ignited with an internal spark. The temperature of the calorimeter rose from 293.50 K to 298.83 K. If the previously-measured heat capacity of the whole calorimeter was C 3.60 kJ/K, calculate the heat transferred to the calorimeter by the reaction. (c) Calculate the experimental enthalpy of reaction in kJ/moln
One mole of an ideal gas undergoes the pressure–volume changes shown in following diagram. Starting at state A, it expands to state B and then expands again to state C. From state C, it is compressed back to A. a) How much work is done in the overall process? b) Sketch and label the corresponding temperature–volume diagram.
The specific heat capacity of element Y is 0.8 cal/goC. If 40 calories of heat are added to 10 grams of element Y, much the temperature then increases by ______ oC .
Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime (calcium oxide), which they produced by roasting limestone (calcium carbonate). 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO,) into solid calcium oxide and gaseous carbon dioxide. ? 2. Suppose 11.0 L of carbon dioxide gas are produced by this reaction, at a temperature of 360.0 °C and pressure of exactly 1 atm. Calculate the mass of calcium carbonate that must have reacted. Round your answer to 3 significant digits.
When 25.0 g hydrogen gas react according to the following reaction, how many kJ of heat are released or consumed? CO (g) + 3 H2 (g) --> CH4 (g) + H2O (g) Delta Hrxn = – 206 kJ a. – 1.28 x 103 J b. – 25.5 J c. – 639 J d. – 2.55 x 103 J e. – 1.29 x 103 J f. none of these