classify each of  the following as exothermic or endothermic and give the change in heat, C3H8(g) +5O2(g) --change--> 3CO2(g) +4H2O(g) +2220 kj 2Na(s) +Cl2(g)---> 2NaCl(s)+819 kj PCl5(g) +67kj ---> PCl3(g) +Cl2(g)

Q: For the following thermochemical equation, CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)        ΔH = –890 kJ…

A: Given reaction: CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l). ∆H = -890 kJ. So, 890 kJ of heat is released…

Q: What is the change in internal energy

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Q: A 115.0-g sample of a metal at 165.0 °C is added to 265.0 g of ethylene glycol (specific heat = 2.43…

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Q: Propane, C3H8(g), is used in many instances to produce heat by burning: C3H8(g) + 5O2(g) → 3CO2(g)…

A: Given :-  C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)      ΔH = -2220. kJ  To calculate :-  Mass of O2…

Q: You performed the displayed reaction in the lab and determined that 336.74 J of heat was released.…

A: The given chemical reaction that has been carried out is given by: NCl3(g) + 3H2 (g) ——> NH3 (g)…

Q: A generic solid, X, has a molar mass of 61.6 g/mol. In a constant-pressure calorimeter, 18.3 g of X…

A: Heat absorbed/ released by a solution can be calculated by usingthe expression:Q = m.Cp.∆T where, m=…

Q: For the following combustion reaction CH3CH₂CH₂COOH(1) +502(g) → 4CO₂(g) + 4H₂O(g) AH = -2.18 × 10³…

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Q: A 63.5-g piece of an unknown metal is heated to 92.40°C and quickly added to 100.0 g of water in a…

A: Given, mass of unknown metal, mu=63.5 g initial temperature of metal, Tiu=92.40°C mass of water,…

Q: 3.24 g of a piece of a metal is initially at 83.0°C. It is dropped into a coffee cup calorimeter…

A: Recall the following expression according to Law of calorimetry       Q=m×C×∆t Mass of metal=3.24…

Q: Enthalpy is the energy absorbed or released when a chemical change occurs. Assume you have the…

A: Heat evolved when, 1 mole of the substance is completely burnt in presence of oxygen is known as…

Q: A coffee cup calorimeter, including that water it contains, has a heat capacity of 425 J/K, and is…

A:

Q: . A 10-g solid was heated in a test tube to 100℃ in boiling water and added to the coffee-cup…

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Q: During a reaction, the temperature of the solution in a coffee cup calorimeter increased by 8.6…

A: Heat of reaction (qreaction ) is given by the formula  q = ms(dT) where m = mass of sample s =…

Q: A 31.74-g lead (Pb) sample at 71.58°C is placed in a constant-pressure calorimeter of negligible…

A: Given, A 31.74-g lead (Pb) sample at 71.58°C is placed in a constant-pressure calorimeter of…

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: We have to calculate the amount of heat released and limiting reactant.

Q: Calculate the heat change (q) in J when 8.111 grams of water is cooled from 1.472 ºC to -2.592 ºC.

A: The heat change during a temperature change ca be calculated as follows. q=mc∆Tq=heat…

Q: If 0.050 mol hydrochloric acid (HCl) is mixed with 0.050 mol of sodium hydroxide (NaOH) in a "coffee…

A: Given : Mass of solution = 183 g  Initial temperature of solution = 25.2 °C Final temperature of…

Q: Calculate the heat (q) for 195 grams of pure water heated from a temperature of 25.0 °C to 77.5 °C.…

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Q: A sample of toluene (C7H8, 92.13 g/mol) was burned in a bomb calorimeter with a specific heat…

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Q: When methanol, CH, OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A:

Q: When 2 moles of C2H6(g) react with O2(g) to form CO2(g) and H2O(g) according to the following…

A: Given : Amount of heat evolved in the reaction = 2.86 X 103 KJ And moles of C2H6 reacted = 2 moles

Q: When a 8.47 g sample of sodium iodide, NaI, dissolves in 160.0 g of water in a calorimeter, the…

A: It is based on the concept of calorimetry.Here we are required to find the heat absorbed by the…

Q: What is the heat, q, in joules transferred by a chemical reaction to the reservoir of a calorimeter…

A: In order to find the amount of heat transferred we first write down the given data: Mass= 105 g. c=…

Q: A coffee cup calorimeter, including that water it contains, has a heat capacity of 425 J/K, and is…

A: Formula: q = C × ∆T where , q = heat  C = Heat Capacity ∆T = Change in temperature   The Heat lost…

Q: Hydrogen, H2, is used as rocket fuel. The hydrogen is burned in oxygen, O2, according to the…

A: To determine the moles of hydrogen present, No. of moles = wM=200 g2.01 g/mol= 99.5 moles

Q: 22.214 g of a metal at 99.73°C was added to 14.2 g of water at 19.05°C. The temperature of the…

A: Given: Mass of metal = 22.214 g Initial temperature of metal = 99.73 °C  Mass of water = 14.2 g…

Q: When 6.54 grams of Zn is placed in 500.0 mL of 1.00 M CuSO4(aq) in a coffee cup calorimeter, it…

A: Given data,Mass of Zn=6.54gMolarity of CuSO4=1.00MVolume of CuSO4=500mL=0.5LTemperature…

Q: Nitromethane (CH3NO2), sometimes used as a fuel in drag racers, burns according to the following…

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Q: When methanol, CH3OH,CH3OH, is burned in the presence of oxygen gas, O2,O2, a large amount of heat…

A: Given: mass of methanol =22.9 g           mass of oxygen = 35.6 g To find: the Amount of heat…

Q: A 135.0-g sample of a metal at 153.0 °C is added to 255.0 g of ethylene glycol (specific heat = 2.43…

A: First we need to calculate heat gain by ethylene glycol. Using that heat we can calculate specific…

Q: The temperature of a sample of aluminum increased by 23.4 °C when 261 J of heat was applied. What is…

A: The objective of this question is to find the mass of the aluminum sample using the given heat…

Q: A piece of unknown substance weighs 44.7 g and requires 2110 J to increase its temperature from 23.2…

A: Specific heat: Specific heat can be defined as quantity of heat required to raise the temperature of…

Q: Isooctane is a primary component of gasoline and gives gasoline its octane rating. Burning…

A: