True or False
A manufacturing company requires 157 kJ of energy to power one
of its machines for a day. The reaction shown below would be able
to provide a sufficient amount of energy for this purpose.
2 HgO(s) → 2 Hg(l) + O2(g) ΔH
= 182 kJ
ΔH for the reaction is positive.
So, the reaction shown will not give any energy instead it requires energy.
So, it will not be able to power the machines
Answer: False
True or False A manufacturing company requires 157 kJ of energy to power one of its...
A chemist measures the energy change ah during the following reaction: 2 HgO(s) + 2 Hg()+ O2(9) AH= 182. kJ Use the information to answer the following questions. This reaction is... Suppose 95.0 g of HgO react. Will any heat be released or absorbed? endothermic. exothermic Yes, absorbed. Yes, released No. 5 ? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round your...
A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(0+0 (9) AH = 182. kJ Use the information to answer the following questions. This reaction is... Suppose 53.2 g of HgO react. endothermic. exothermic. Yes, absorbed. Yes, released. No. Will any heat be released or absorbed? X 5 ? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed....
Which one of the following is not a state function ? change in temperature internal energy enthalpy heat Calculate ΔH for the following reaction C2H4 (g) + 6 F2 → 2 CF4 (g) + 4 HF (g) from H2 (g ) + F2 (g) → 2 HF (g) ΔH = - 537 kJ C (s) + 2 F2 (g) → CF4 (g) ΔH = -680 kJ 2 C (g) + 2 H2 (g) → C2H4 (g) ΔH = + 52 kJ...
Please help with these two questions :(
1. How much energy (in kJ) is evolved during the reaction of
76.9 g of Al, according to the reaction below?
Fe2O3(s) + 2 Al(s) →
Al2O3(s) + 2 Fe(s) ΔH°rxn = -852
kJ
Assume that there is excess Fe2O3.
2. A 12.43 g sample of ethanol (C2H5OH) is
burned in a bomb calorimeter with a heat capacity, C = 5.65
kJ/°C.
C2H5OH(l) + 3 O2(g) → 2
CO2(g) + 3 H2O(g) ΔH°rxn...
1. Which reaction(s) is/are exothermic? Select all that apply. ΔHf° in kJ/mol at 25°C MgO -601 Fe2O3(s) -824 Ag2O (s) -31 Al2O3(s) -1676 Group of answer choices a. 6Ag(s) + Fe2O3(s) --> 3Ag2O(s) + 2Fe(s) b. 2Al(s) + Fe2O3(s) --> Al2O3(s) + 2Fe(s) c. 3Mg(s) + Fe2O3(s) --> 3MgO(s) + 2Fe(s) 2. Which metal requires the most energy to extract (i.e. return to it's metallic form) from it's ore? Reaction ΔHf° kJ/mol metal oxide 2Au(s) + 3/2 O2(g) --> Au2O3(s)...
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The below equation represents an exothermic reaction: Reactants + delta H ----> product ATrue B-False -------------------- QUESTION 3 The Styrofoam cup was used as an insulated device that allows heat loss A-True B-False -------------------- QUESTION 4 The following is an endothermic reaction; NaOH+ HCI------> NaCl+H2O+42.12KJ A-True B-False -------------------- QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of NaOH needed to make the reaction above...
d two moles of hydrochlorhermal energy arck on the su ®, 150,0 kJ of thermal serey are released at 25.00°C and o the surroundings as work is d only P- 7. When one mole of zinc and two moles of hydrochloric acid undergo the read Zn(s) + 2 HCl(aq) → ZnCl, (aq) + He), 150,0 kJ of thermal energy are reicas 1.000 atm. The Ha gas generated does approximately 2 500 KJ of work on the surroundings as expands. Calculate...
True or False
t. For an exothermic reaction, the equilibrium constant, Kc, becomes smaller as the temperature increases and larger as the temperature decreases. u. The gas-phase equilibrium shown below is used to produce ammonia, NH3, for commercial applications. The NH3 yield can be increased by decreasing the temperature, increasing the pressure, and removing some NH; from the mixture. N2(g) + 3H2(g) - 2NH3() AH = -94 kJ. v. For the gas-phase equilibrium described above (see problemlu), an increase in...
1) Use the Energy-Interaction Model to explain whether the following statement is true or false: "A quantity of ice at 0℃ must contain less total energy than the same quantity of water at 0℃.2) According to the definition of heat in the online reading, can an energy system contain a certain amount of heat? Explain.3) Imagine that you place a piece of copper with an initial temperature of 20℃ in contact with some liquid water with an initial temperature of...
2- Therro dynamics e that best completes the statement or answers the question TIPLE CHOICE. Choose the one alternative that best completes the at 1) The SI unit for pressure is the A) newton. B) pascal C) MM Hg D) atmosphere. 2) The mixing of different gases by random molecular motion with freque A) diffusion. B) Dalton's law. C) compressibility. D) effusion 3) Entropy is a measure of A) the rate of a reaction. C) molecular randomness. B) free energy...