W(g) + X(g) ⟶ WX(g) ΔH = +40 kJ does heat flow into the sytem or out of the system or can't we tell?

Q: What mass of water need to evaporate from your skin in order to dissipate 170,000 J of heat from…

A: Given data heat dissipate : q = 170000 J  =  170.000 KJ H2O (liq) →H2O (g)           ∆Hv=40.7…

Q: If a lighter contains 4.0 mL of liquid butane (density of butane = 0.8 g/cm 3 ), how energy can be…

A: Given: The density of butane is 0.8 g/cm3. The volume of butane present in the lighter is 4.0 mL.…

Q: Calculate the change in internal energy and indicate whether the energy of the system has increased…

A: #2: The change in internal energy(∆U), heat(q), and work done(w) are related through the 1st law of…

Q: In winter, an electric heater uses a certain amount of electrical energy to heat a room to 20oC. In…

A: The change in internal energy of heater has to be predicted and explained.

Q: How much heat is evolved when a 35.0 g sample of copper increases from 25.0oC to 35.5oC? Group of…

A: The heat 'q' which is required to increase the temperature of a sample of mass 'm' having specific…

Q: Calculate ΔHrxnΔHrxn for the following reaction: CH4(g)+4Cl2(g)→CCl4(g)+4HCl(g) given these…

A: The reactions given are, 1) C (s) + 2 H2 (g) → CH4 (g)…

Q: their enthalpy changes,                         N2 (g)   +   O2 (g)    -->    2 NO (g)…

A:

Q: What is the specific heat capacity of gold if it requires 48.8 J to raise the temperature of 15…

A: Specific heat capacity of Gold can be calculated as follows: where q is the heat energy, m is the…

Q: A coffee-cup calorimeter contains 30 mL of water with an initial temperature of 24.8°C. An unknown…

A:

Q: What is the change in internal energy for a system if the system absorbs 322 kJ of heat and has…

A: Given that: Work done on the system (W) = 750.0 kJ Heat absorbs (q) = 322 kJ (since heat is…

Q: Calculate ΔHrxn for the following reaction: CH4(g)+4Cl2(g)→CCl4(g)+4HCl(g) given these reactions and…

A: Three individual reactions are given along with their ∆H values.

Q: What is the change in internal energy (delta E) for the system?

A:

Q: 1. What is the connection between Hess's law and the fact that enthalpy is a state function? 2.…

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Q: In Part B of the experiment, a student mixes 28.0 mL of 1.100 M HCl(aq) with 28.0 mL of 1.000 M…

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Q: In the laboratory a student burns a 0.398-g sample of decanoic acid (C10H2002) in a bomb calorimeter…

A: A bomb calorimeter is an instrument which is used to determine whether the reaction is endothermic…

Q: What is the change in internal energy for each of the following situations? q = 7.9 J out of the…

A: The first law of thermodynamics says that total energy of the universe remains constant. Energy is…

Q: In a calorimeter, 1.80 g of NH&NO%0) (80.04 gmol') is mixed with 74.0 g of water at an initial…

A: Given data,Mass of NH4NO3=1.80gMass of water=74.0gInitial temperature=25oCFinal…

Q: 3) A system moves from state A to state B. When the system takes path 1, 500 Jof heat flow into the…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: For the chemical reaction: CaO(s) + 3C(s) -> CaC2(s) + CO(g); deltarH = + 464.8 kJ/mol-rxn. What is…

A: Calcium oxide reacts with carbon to form calcium carbide and carbon monoxide. The equation for the…

Q: Write an expression for the difference in internal energy between State A and State B in terms of…

A: The question is related to general chemistry where addition and subtraction of energy needs to be…

Q: Answer the problems and show complete solutions. 1. Explain the difference between heat capacity and…

A: The relation between heat energy and specific heat is given by  Q = mCΔT Q = heat energy m = mass of…

Q: Which of the following (with specific heat capacity provided) would show the smallest temperature…

A:

Q: 15.5a of an nknown. metal at 8l6.30°C .5 placed.in 50a at 7.60°C, The waters temparature is measured…

A: Given mass of unknown metal = 15.5 g Initial temperature of metal = Ti = 86.30 0C Final temperature…

Q: Use reactions A and B to determine the change in enthalpy (kJ) for reaction C. Do not type units…

A: The change in enthalpy could be calculated with the help of Hess's law. The change in enthalpy of…

Q: Write the balanced equation (total ionic) for the

A: We haven to give the total Ionic equation of given reaction, and tell why reaction got heated up.…

Q: Lead has a molar heat capacity of 26.4 J/K•mol. What molar enthalpy change occurs when lead is…

A:

Q: cooking oil is 1.75 J/(g⋅°C).1.75 J/(g⋅°C). How much heat energy is needed to raise the temperature…

A: Heat of reaction is difference of energy of product  and energy of Reactant. If heat of reaction is…

Q: When 15.0 mL of 3.00 M NaOH was mixed in a calorimeter with 13.0 mL of 3.00 M HCl, both initially at…

A:

Q: The combustion of 1.00 mol of glucose (C6H12O6) liberates 2820 kJ of heat. If 1.83 g of glucose is…

A: Concept is based on calorimetry:

Q: if you boiled a 15 g piece of metal in water (100C) then put it in a calorimeter containing 20 ml of…

A:

Q: What is the change in the enthalpy (in kJ) for the complete combustion of 39.0 g of fructose,…

A: Heat of reaction or enthalpy change∆Hrxn is defined as heat released and absorbed during a reaction.…

Q: A 74.8 g sample of a metal at 143.2 °C is added to an insulated vessel containing 208g of water at…

A: The given data contains, mass of metal =74.8 g mass of water =208 g initial temperature of water…

Q: What mass of aluminum metal would absorb 250.0 kJ when it melted at its melting point? The molar…

A:

Q: What was the internal heat when the change in energy was 750 J and the work by the system was 200 J?…

A: Given: Internal energy, U = 750 J Work done by the system, w = +200 J Heat, q=?

Q: In an experiment, 5.30 g of lithium chloride is dissolved in 100 cm3 of water to give 105.3 g of…

A: To calculate the molar enthalpy of solution, heat absorbed by the water should be calculated.

Q: Consider the following reaction and associated enthalpy data for a particular temperature. 2 NH3(g)…

A: The reaction is given as, 2NH3 (g) <=> N2 (g) + 3H2 (g) The ∆fH° is given as +92 kJ/mol ∆H° is…

Q: Which system does more work: (a) ΔE = –436 J, q = 400 J; or (b) ΔE = 317 J, q = 347 J? In which…

A: The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes…

Q: 3. Define calorimetry and describe the two commonly used calorimeters. 4. When a 1.50 g sample of…

A:

Q: What is the heat capacity (Cp) of a 7.5 g piece of tin if its temperature changes by 12.3°C when it…

A: Given that  Heat (Q) = 20 J  Change in temperature (∆T) = 12.3°C  Mass of tin (m) = 7.5 g

Q: 1. A student is determining the enthalpy of solution for ammonium nitrate by adding ammonium nitrate…

A: A calorimeter is used to find the amount of heat involved in a chemical reaction. The knowlede of…

Q: Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction:…

A: Given: N2(g) + O2(g) ----> 2NO(g)        ∆H = +180kJ ----(1) 1/2 N2(g) + O2(g) ----> NO2(g)…

Q: Calculate the amount of heat necessary to raise the temperature of 135.0 g of water from 50.4°F to…

A: When temperature increases then amount of heat released is  Q = m.s.∆T

Q: In Part B of the experiment, a student mixes 28.0 mL of 1.100 M HC1(aq) with 28.0 mL of 1.000 M…

A:

Q: Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42…

A:

Q: A piece of silver with a mass 368 g has a heat capacity of 87.2 J/°C. What is the specific heat of…

A: Given that heat capacity = 87.2 J/°C mass of silver = 368 g Specific heat capacity = heat…

Q: Consider the decomposition of hydrogen bromide to form hydrogen and gaseous bromine, Br2(g):…

A: The given forward reaction is :  HBr(g) = 1/2H2(g) + 1/2Br2(g)  H = 72.5 kJ  a. The reverse reaction…

Q: 4. When a solution containing 8.00 g of NaOH in 50.0 g of water at 25.0 °C is added to a solution of…

A: Answer :-  3) The reaction will be non spontaneous at all temperature.  4)   ∆H = -50.19 (kJ) or  ∆H…