What mass of water need to evaporate from your skin in order to dissipate 170,000 J of heat from your body? Given: H2O (l) H2O (g) Hvap = 40.7 kJ/mol

Q: A coffee-cup calorimeter contains 20 mL of water with an initial temperature of 24.8°C. An unknown…

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Q: enthalpy

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Q: CH4(g) + 2O2(g) CO2(g) + 2 H2O(1) AH = -890.3 kJ. How much heat will be released if 4.0 g of methane…

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Q: Consider the following reaction: CH, (9) + 20, (9) → CO2(9) + 2H, O(1) AH =-891 kJ a. Calculate the…

A: The balanced reaction taking place is given as,                                           ΔH = -891…

Q: When a 2.66-g sample of solid ammonium chloride dissolves in 37.8 g of water in a coffee-cup…

A: The heat of a reaction or change in enthalpy of a reaction is associated with the amount of heat…

Q: 4.78 x 10 kJ E) 1,040 kJ 51.Methanol (CH,OH) burns according to the equation 2CH,OH(I) +…

A: The given reaction is,

Q: Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the…

A: Given, moles of CaCO3 formed = 3.8 mol

Q: When a 4.25-g sample of solid sodium nitrate dissolves in 50.0 g of water in a coffee-cup…

A: The mass of sodium nitrate is = 4.25 g The mass of water is = 50.0 g The mass of solution is =…

Q: A 75.0 g piece of Ag metal is heated to 80.0 °C and dropped into 50.0 g of water at 23.2 °C. The…

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Q: A 4g sample of methanol(CH3OH) is burned in a calorimeter whose heat capacity is 726.1 kJ/°C. The…

A: Given: Heat capacity of calorimeter = 726.1 KJ/oC Mass of CH3OH burned = 4 g. Initial temperature of…

Q: Consider the following reaction: CH4 (9) + 20, (9) → CO2 (g) + 2H, O(1) AH=-891 kJ a. Calculate the…

A: We have enthalpy of combustion of methane as -891 KJ. a) we have to calculate the enthalpy change…

Q: enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

A: Enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

Q: 1. How much phosphorus in grams is required to release 222.94 kJ of heat? 5 Ni + 2 P -> Ni5P2  △ H…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: 2. A 35 g metal ball made up of a mixture of element X and element Y is heated up to 77°C and…

A: Solution and calculation see below

Q: What mass of octane (C8H18) must be burned in order to release 5340 kJ of heat? DHcomb = – 5471…

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

Q: Ignition wires heat sample Thermometer Stirrer A bomb calorimeter, or constant volume calorimeter,…

A: "Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 6. How much work is needed in a system to expand from 25 to 50 L against a pressure of 7 atm? Is…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 1. When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee- cup…

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Q: 3. How much heat energy is required to raise the temperature of a 30.0g sample of aluminum from…

A: 3) weight of sample = 30g Ti = 15°C and Tf = 35°C Specific heat of aluminium = 0.89 J/g°C 4) weight…

Q: Assume that it is possible to heat water with perfect insulation (all the heat from combustion of…

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Q: Suppose you burned 0.300 g of C(s) in an excess of O₂ (g) in a constant-volume calorimeter to give…

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Q: A 625 g chunk of iron is removed from an oven and plunged into 525 g of water in an insulated…

A: The heat lost by iron = heat gained by water heat gained by water (q) = m x S x ΔT…

Q: Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the…

A: The given balanced chemical reaction is  Ca(OH)2(aq)  +  CO2(g)  → CaCO3(s) + H2O(g). Given data…

Q: 5) Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. C6H1206(s)→2 C2H5OH(/) +2…

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Q: the change in enthalpy for ammonium nitrate dissolving in water is 25.7 kJ/mol. determine the amount…

A: We have to calculate the mass of Ammonium nitrate dissolved.

Q: With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3 (9) + 502(g) →…

A: Answer: reaction for whom enthalpy change is given is: 4NH3(g)+5O2(g)→4NO(g)+6H2O(g) Now the…

Q: 30.0 mL of water at 10.0 C is mixed with 50.0ml of water at 60.0C, what is the final temperature of…

A: Temperature (T1)= 10°C Volume(v1) = 30ml Density of water = 1 g/ml So, mass of water = 30g* (m1)…

Q: Calculate the molar enthalpy change of H2O(1) when liquid water is heated from 41.7°C to 76.2°C.

A: Given :  Initial  temperature  = 41.7°C  Final temperature = 76.2°C  Molar mass of H2O(l) = 18 gm/…

Q: Ethanol, C2H5OH, is used as a fuel for motor vehicles, particularly in Brazil. (a) Write the…

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Q: nitrogen and hydrogen react to form ammonia: N2(g) + 3 H2(g) 2 NH3(g) AH=-92. kJ In the second step,…

A: The question is based on the concept of chemical thermodynamics. it involves the application of Hess…

Q: Hydrazine, N3H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the…

A: ΔH is an extensive property....

Q: 4. A 1.00-g sample of octane (C3H18) was burned in a bomb calorimeter with 1300 g of water (H20).…

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Q: The combustion of 1.048 g of benzene (C,H6) in a bomb calorimeter surrounded by 945 g of water…

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Q: With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3 (9) + 502 (g) →…

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Q: When 0.0901 mol of an unknown hydrocarbon is burned in a bomb calorimeter, the calorimeter increases…

A: Applying formula   Q= C×∆T/n

Q: Methane is a major component of natural gas. Methane burns in air, releasing approximately 890 kJ of…

A: 1 mole of methane releases 890 kJ 0.521 mole of methane releases ___ kJ Heat released = 0.521 mol x…

Q: 11) q of combustion of the food sample equals a) q absorbed by the calorimeter -q absorbed by the…

A: We have given that  11) q of combustion of the food sample equals   a) q absorbed by the calorimeter…

Q: A 5.1-gram piece of gold jewelry is removed from water at 100.0°C and placed in a coffee-cup…

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Q: A solid silver coin (specific heat = 235 J/kg°C) is heated to a temperature of 58.0°C and added to…

A: Given data Silver coin Specific heat = 235 J/kg °CInitial Temperature = 58 °CFinal Temperature = 27…

Q: What is the molar heat of combustion of butane, C4H10, if combustion of 2.00 g of butane causes a…

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Q: How many milliliters of water at 23 °C with a density of 1.00 g/mL must be mixed with 180 mL (about…

A: Use calorimetry principle to get answer Heat flow from high temperature to low temperature. Heat=…

Q: A gas is compressed and changes its volume from 1.50 L to 0.240 L against a constant pressure of…

A: Given, A gas is compressed and changes its volume from 1.50 L to 0.240 L against a constant pressure…

Q: Consider a 15.0 g piece of tin metal initially at 25 oC, What is its specific heat if adding 250 cal…

A: Given that Mass of the metal = 15.0 g Initial temperature = 25oC Final temperature = 125oC Heat…

Q: 2) A piece of unknown solid substance weighs 437.2 g, and requires 8460 J to increase its…

A: Given that: Mass of the substance, m  = 437.2 g Initial temperature, Ti = 19.3 oC Final temperature,…

Q: 2 NO(g) + O2(g) ––––> 2 NO2(g); ∆H° = –114.4 kJ Given the thermochemical equation above, how much…

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

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Q: 4. A 1.00-g sample of octane (C3H18) was burned in a bomb calorimeter with 1300 g of water (H20).…

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

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Q: Determine the amount of heat (in kJ) needed to warm 374 g of sand (the specific heat capacity of…

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