Measurements show that the energy of a mixture of gaseous reactants decreases by 336.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 121.kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Is the reaction exothermic or endothermic?

Q: A 75.0 gram piece of titanium is heated to a temperature of 98.40ºC. The metal is then dropped into…

A: Write the expression of heat change due to the change in temperature. ∆H=ms∆t Where ∆H is the heat…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 246.kJ during a…

A: Given: Change in internal energy (∆U) = 246 kJ Work done (W) = 198 kJ

Q: In a gas expansion, 91 J of heat is absorbed from the surroundings, and the energy of the system…

A:

Q: A 1.45 g sample of acetic acid , HC2H3O2 was burned in excess oxygen in a bomb calorimeter. The…

A: We have to predict the heat of combustion.

Q: A 3.527 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: Given,  Mass of the sample = 3.527 g  Initial temperature = Ti = 24.87 0C  Final temperature = Tf =…

Q: calculate the molar heat capacity of a mercury metal with specific heat capacity of 0.140 j/g0c.

A: Molar heat capacity is the amount of heat required to increase the temperature of one mole…

Q: A 3.10 g sample of methane, CH4, is combusted in a calorimeter. The calorimeter and water combined…

A: Given: Mass of methane = 3.10 g Heat capacity of calorimeter and water = 41.50 kJ/K Rise in…

Q: In an experiment, a 1.3440 g sample of dimethyl oxalate (C4H6 O4) is burned completely in a bomb…

A: The objective of this question is to calculate the molar heat of combustion of dimethyl oxalate…

Q: The work done to compress a gas is 93 J. As a result, 38 J of heat is given off to the surroundings.…

A: Work done to compress = Work done on the systemand work done on the system is taken as a positive…

Q: A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the…

A: Given,moles of the compound = 2.00 molmass of the solution = 135 ginitial temperature of the…

Q: A 42.5 gram piece of chromium is heated to a temperature of 98.70ºC. The metal is then dropped into…

A: Mass of chromium = 42.5 g Mass of water = 36.0 g To find final temperature

Q: Under Measurements show that the enthalpy of a mixture of gaseous reactants increases by 206. kJ…

A:

Q: 1.435 g of naphthalene (C10H8) is burned in a bomb calorimeter. There is exactly 2000.0 g of water…

A:

Q: Suppose we combust a 0.794 g sample of hexane (C6H14, molar mass = 86.18 g/mol) in a bomb…

A:

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 261. kJ during a…

A:

Q: A 20 g sample of dry ice (CO₂(s)) is placed in a glass flask and a stopper is tightly placed in the…

A: Given :-  Mass of CO2 = 20 g  Heat energy is transferd into the flask = q = + 350 J   change in…

Q: An electrical heater adds 21.9 kJ of heat to a constant-volume calorimeter. The temperature of the…

A:

Q: A 50.0 mL solution of 0.600 M compound A is mixed with an excess of compound B solution at 13.5° C…

A: The reaction will be written as A+ B ---> C + H2O mass of solution= 195 g Heat capacity of…

Q: Zinc metal reacts with hydrochloric acid according to the following reaction: % Zn (s) + HCI (aq) →…

A: The reaction given is, Given: Mass of Zn reacting = 0.9807 g. Concentration of HCl = 0.250 M Volume…

Q: A piece of metal of mass 18.0g at 100 degrees Celsius is placed in a calorimeter containing 50.2…

A:

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 391kJ during a…

A: According to the question,The enthalpy of a mixture of gaseous reactants is increased by ΔH = 391…

Q: ermined that 52.4 kJ of work is done by the mixture during the reaction.  What is the correct change…

A: According to first law of thermodynamics, the total energy of system is conserved.∆U=q+w∆U=change in…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 153. kJ during a…

A: According to the first law of thermodynamics, the total heat change of a system at constant pressure…

Q: A student performed the procedure described in the lab manual using 49.9 mL of 1.0 M HCI and 49.3 mL…

A: Molarity of HCl = 1.0 MVolume of HCl: 49.9 mLMolarity of NaOH = 1.0 MVolume of NaOH = 49.3 mLInitial…

Q: In parts 2, 3 and 4 of this lab, you will be conducting calorimetry experiments on neutralization…

A: In calorimeter, the heat of the reaction is calculated using the formula q=m×c×∆T where m is the…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 362. kJ during a…

A: The objective of this question is to calculate the change in enthalpy of a gas mixture during a…

Q: An electrical heater adds 23.7 kJ of heat to a constant - volume calorimeter. The temperature of the…

A: The objective of the question is to calculate the molar energy of combustion of methanol using the…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 397. kJ during a…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: As a system in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The…

A: The internal energy of the system can be modified by doing work on them or by adding heat to the…

Q: 0.3 g of CaO was added to 59mL H2O at 23.5 degrees Celcius in a cup calorimeter to produce Ca(OH)2.…

A:

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 177. kJ during a…

A:

Q: For the reaction N₂(g) + O2(g) → 2 NO(g), AH = 180.5 kJ How much energy is needed to generate 25…

A: Nitrogen reacts with oxygen to form nitrogen monoxide. The equation for the balanced chemical…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 338. kJ during a…

A: Enthalpy change(∆H) = 338 KJ Work (W) = +135 KJ (positive because work done on the system)

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 231. kJ during a…

A:

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 219. kJ during a…

A: