Liquid ammonia (boiling point = –33.4°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from –65.0°C to –12.0°C? Specific heat capacity, NH3(l): 4.7 J/(g·K) Specific heat capacity, NH3(g): 2.2 J/(g·K) Heat of vaporization: 23.5 kJ/mol Molar mass,   : 17.0 g/mol

Q: What quantity of energy, in joules, is required to raise the temperature of 455 g of tin from room…

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Q: 5. A 60.0 g sample of H20 at 275 K is mixed with a 20.0 g sample of H2O at 320 K. Calculate the…

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Q: For the chemical reaction H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol. What is the enthalpy (in…

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Q: In the following reaction, how many grams of CH3OH are required to produce 1.932 × 10³ kJ of heat?…

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Q: If 117.4 g of copper at 100.0 ℃ is added to 26.7 grams of water at 25.7 ℃, what is the final…

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Q: In the following reaction, what quantity in moles of CH₃OH are required to give off 2941 kJ of heat?…

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Q: In the following reaction, what quantity in moles of CH₃OH are required to give off 6056 kJ of heat?…

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Q: How much heat in kJ is needed to raise the temperature of 130.0 g of water from 15 °C to boiling…

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Q: Calculate the total energy in kJ required to change the temperature of 238 g water from 19.0  oC to…

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Q: A hot lump of 25.225.2 g of iron at an initial temperature of 65.0 °C65.0 °C is placed in 50.0 mL…

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Q: A 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

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Q: If 29.00 g of aluminum at 76.45 °C is dropped into 125.7 g of water at 34.04 °C, what will be the…

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Q: 50.0 mL of hot water (49.6 oC) is added to 50.0 mL of cold water (24.7 oC). Upon mixing the water…

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Q: A piece of iron (mass = 25.0 g) at 398 K is placed in a styrofoam coffee cup containing 25.0 mL of…

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Q: A hot 111.6 g lump of an unknown substance initially at Substance Specific heat (J/(g.°C)) 150.0 °C…

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Q: A 1.00 g sample of MgCl2 produced a 10.00 °C increased in a calorimeter charged with 40.0mL of…

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Q: 67.0 mL of hot water (45.4 oC) is added to 45.0 mL of cold water (22.3 oC).  Upon mixing the water…

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