heat in cal

Q: At 1 atm, how much energy is required to heat 53.0 g H2O(s) at −16.0 ∘C to H2O(g) at 155.0 ∘C?

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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 the laboratory a "cefee cup calerimer, or constant pressure calorimeter, in frequently und to…

A: Mass of Zn = MZn= 69.1 gInitial temperature of Zn = Tzn = 98.40°CMass of water = M = 82.88 gInitial…

Q: The following chemical equation, ΔΗ C (graphite, s) + 2 O2 (g) → CO2 (g) - 393. 5 kJ / mol - Is an…

A: Given reaction,         C(graphite, s)  +  2 O2(g)  →  CO2(g)    ∆H  =  - 393.5 kJ/mol

Q: Given the data:       N2(g) + O2(g) ---> 2NO(g)             DH = +180.7 kJ       2NO(g) + O2(g)…

A: (1) N2g + O2g → 2NOg         ∆H = +180.7 KJ   2NO(g) + O2(g) → 2NO2(g)       ∆H = -113.1 KJ…

Q: Rxn A: C(s) + O2(g) → CO2 (g) AH c = -393.5 kJ/mole Rxn B: C8H18(1) + 25/2 O2(g) → 8CO2(g) + 9H2Ou)…

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Q: A 150 g sample of a metal is heated to 75.0°C and then placed in a calorimeter containing 150.0 g of…

A: Interpretation -  To determine the specific heat capacity of metal when a 150g of metal is heated to…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 106.0 mg sample…

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Q: If 9.84 moles of H2O(1) at 0.00 degrees C is heated to a final temperature of 18.8 degrees C. How…

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Q: When one mole of C6H6C6H6 is burned, 3.27 MJ3.27 MJ of heat is produced. When the heat from burning…

A: Given : burning 1 mole of C6H6 produces heat = 3.27 MJ = 3.27 X 106 J…

Q: A student mixes 41.8 g of ethanol at 15.8°C with 50.7 g of water at 49.2°C. If the resulting…

A: To find the answer, just compare the heat that ethanol gains to the heat that water loses. Water…

Q: The change in internal energy for a given gas-phase system is –1465 J. The system loses 455 J of…

A: The objective is to determine the final volume of gas. Given Data:Internal energy change, U is −1465…

Q: Substance "C" is identified to have a specific heat capacity of 0.452 J/(g.°C). Which substances…

A: To estimate about specific heat , we would check heat energy added and temperature change.

Q: From the thermochemical equations given below, and applying Hess’s law, NO(g) + O3(g)= NO2(g) + O2…

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Q: A 35.17 g35.17 g sample of a substance is initially at 24.4 ∘C.24.4⁢ ∘C. After absorbing 2097 J2097…

A: Given  mass (m) = 35.17g heat (q) = 2097 J T1 = 24.4°C T2 = 137.9°C

Q: (a) Consider the following thermochemical data to: 2CO2(g) → 2 C (s, graphite) + 2 O2 (g) AH° =…

A: The enthalpy change of an reaction is extensive property i.e on changing the stoichiometry of…

Q: .110. Suppose that there is 2.43 mol of nitrogen gas in an insulated, sealed 31.7-L container…

A: solution

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: The amount of heat (q) gained or lost by a substance (with mass m) as its temperature changes (A7)…

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Q: 2 NH4CIO4(s)→ N₂(g) + Cl₂(g) + 2 O2(g) + 4 H₂O(g) AH = -375.6 kJ The enthalpy of formation of H₂O(g)…

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Q: 2 NO(g) - N2(g) + O2(g) 4,H° = -181 kJ/mol-rxn What is the enthalpy change that occurs when 3.00 g…

A: Given  Reaction  2NO(g)  -----> N2(g)  +  O2(g)        ∆rH°  = -181 KJ/mol Enthalpy Changes when…

Q: Use Hess’s Law to determineDH for the reaction     C3H4 (g)  +  2 H2 (g) ®  C3H8 (g),  given that…

A: When a chemical reaction occur, some bonds are broken and some are formed.This leads to an energy…

Q: Given the following thermochemical equations, 4NH3(g) + 702(g) → 4NO2(g) + 6H2O(g) 6NO2(g) + 8NH3(g)…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: CH4 instead of water. The enthalpy Imagine a person sweats for evaporating liquid CH4 is +8.2…

A: A question based on chemical thermodynamics that is to be accomplished.

Q: From experiments, you know the following thermochemical equations: 5C(s) + 6H2(g) →C5H12(g) ΔH1 = -…

A: The given thermochemical equations are as follows: Equation (1):    5C(s) + 6H2(g) →C5H12(g)…

Q: Given the following thermochemical equations: 1) 2N2(g) + 202(g) → 4NO(g) AH = 2(-180.5 kJ) 2)…

A: Calculate then enthalpy of the given reaction --

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 412.0 mg sample…

A: The molar heat capacity of a compound is defined as the amount of heat required to raise the…

Q: The combustion of 2.067 g of propanol (C, H,OH) increases the temperature of a bomb calorimeter from…

A: Given : Mass of C3H7OH combusted = 2.067 g Initial temperature of calorimeter = 298.00 K Final…

Q: What quantity of heat (in kJ) will be released if 0.5649 mol of NH, are mixed with 0.200 mol of O,…

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Q: 4. Methane burns in air to form carbon dioxide and water according to the following equation: CH +…

A: 1) When ΔH < 0, the reaction is Exothermic. When ΔH > 0, the reaction is Endothermic. 2)In…

Q: -1 1 A 28.0 g sample of brass, which has a specific heat capacity of 0.375 J.g .°℃ is dropped into…

A: The objective of this question is to calculate the equilibrium temperature of the water when a brass…

Q: A student conducted several calorimetry investigations. In the first of the investigations, the…

A: Mass of metal piece Mm = 21 g  Temperature of metal piece Tm = 80°C Specific heat capacity of metal…

Q: 2C,H,0(g) + 500,(g) 4 CO2(g) + 4 H,0(g) Be sure any of your answers that are calculated from…

A: “Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

Q: Hydrazine, N2H41), is used in rocket fuels. The thermochemical equation for the combustion of…

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Q: An 33.83 g sample of aluminum is placed on a 66.98 g sample of copper initially at 112.55oC. If the…

A: Given: Mass of Aluminum taken = 33.83 g Mass of copper taken = 66.98 g Initial temperature of copper…

Q: The combustion of 2.268 g of propanol (C,H,OH) increases the temperature of a bomb calorimeter from…

A: Given that : The mass of propanol = 2.268 g Initial temperature = 298.00 K Final temperature =…

Q: Using Hess's Law determine the delta H for the following reaction, likewise, note if the reaction is…

A: Using hess's law we have to determine ∆H for a given reaction.

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.04 kg sample…

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Q: H8. The enthalpy of vaporization of benzene, C6H6(l) is 33.9 kJ/mol at 298 K. How many liters of…

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Q: Which of the following statement(s) is (or are) true? I. Heat (g) is a state function because AH is…

A: Heat is not a state function because it is not an intrinsic property of a system Heat is not a state…

Q: An electrical heater is used to supply 235.0 J of energy to a 15.0 g sample of water, originally at…

A: Given,15.0 g sample Energy of heater = 235.0 JInitial temperature = 295.0 K