energy in kJ

Q: What mass of molybdenum (molar mass=95.94g/mol) is needed for the mercury to release 600.0J of…

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Q: Calculate heat change in joules for vaporization of 3.00 g of water at 100 ∘C∘C.

A: Heat of vaporization: The amount of heat required to convert 1g liquid into vapor. Heat vaporization…

Q: Calculate the heat in kJ for 9.98 g of ice at -10.0 °C cooled to -75.0 °C with a specific heat…

A: Specific heat capacity of a substance is the heat capacity of a sample of the substance divided…

Q: How many joules of heat are absorbed then ice is heated from -15.6 °C to -1°C, the specific heat of…

A: Given Mass = 15.1 g Specific heat = 2.10 J/g-°C Temperature change = -15.6°C to -1°C

Q: Determine the amount of energy required to cool down 450.5 g of liquid iron at 1853 ∘C to 25 ∘C, the…

A: Melting point is the equilibrium temperature at which a substance exists in both solid and liquid…

Q: Calculate the heat change in calories for melting of 0.30 kg of water at 0*C. The heat of fusion for…

A: Given : mass of water = 0.30 Kg  Heat of fusion of water = 80 cal/g And temperature of water = 0 oC…

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: No. of moles = Given mass / Molar mass   No. Of moles of Si = 7.04g / 28.086g/mol No. Of moles of Si…

Q: A 22.5-g sample of ice at 0.0 oC is added to 100.0 g of warm water at 35.0 oC, and the final…

A: Given : Mass of ice = 22.5 g Initial temperature of ice = 0.0 oC Final temperature of mixture =14.0…

Q: How many joules of energy must be removed from 172 g of water at 27.1 °C to form ice at 0 °C?

A: Specific heat of substances.

Q: The melting point of calcium is 851 oC, its solid-state specific heat (Csolid) is 0.632 J/goC, and…

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Q: How much heat energy, in kilojoules, is required to convert 77.0 g of ice at −18.0 ∘C to water at…

A: Specific heat of ice (Cp) = 2.10 J/g. oC specific heat of water (Cp) = 4.18 J/g. oC heat of fusion…

Q: How many joules of heat are required to melt 4.5 g of copper at a temperature of 1083°C? Use the…

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Q: Ethanol (C2H5OH) melts at −114 ∘C and boils at 78 ∘C. The enthalpy of fusion of ethanol is 5.02…

A: Given Mass of ethanol = 40.5 g Initial temperature =  34 ∘C  Final temperature =  78 ∘C Ethanol…

Q: Given 352 mL of water at 26 °C in a perfectly heat-insulating container, how much ice at 0 °C (in…

A: M

Q: How many grams of ice can the amount of heat required to raise the temperature of 3.50 moles of…

A: Given data,Moles of water=3.50moles∆T=50.0oC∆Hm=6.01kJ/mol

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: Given: The heat of fusion of Si, (∆Hfus) = 43.4 kJ/mol. The mass of Si, (m) = 9.29 g. The molar mass…

Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kj would be needed to melt a…

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Q: 72.3 g of ice at -15.0°C has heat energy added to it until it becomes steam at 145°C. Calculate the…

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Q: A 480.5 gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C to 51.8 °C.…

A: The following steps take place,energy absorbed or released to heat the solid from -23.1oC to 17.6,…

Q: How much heat energy is required to convert 90.2 g of solid iron at 24 C to liquid iron at 1538 ∘C?…

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Q: How many joules of energy are required to change 50.0 g of Cu from 25.0°C to a liquid at its melting…

A: Given:  Mass of Cu given= 50.0 g  Initial temperature= 25°C  Final temperature= 1083°C  Specific…

Q: How many joules of energy must be removed from 175 g of water at 22.2 °C to form ice at 0 °C?

A: Mass of water = 175 g  Initial temperature = 22.2 °C  Final temperature = 0°C  The amount of energy…

Q: How much heat in cal is necessary to vaporize 685 g of h2o at 100 degrees c?

A: Latent heat is the amount of heat, which is released or absorbed by a substance when it is…

Q: Suppose 1.0 x 102 grams of ice absorbs 1255 J of heat, reaching a final temperature of -2.0°C.  What…

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Q: How much heat (in kJ) would be required to convert 21.0 g of ice to water at 0°C?

A: Concept: The branch of chemistry that deals with the structure, properties and the reaction of the…

Q: The heat of fusion of pure silicon is 43.5 kJ/mol. How much energy would be needed to melt a 5.24-g…

A: Mass of silicon= 5.24g MOLAR mass = 28g/mol Mole= mass÷molar mass=  5.24÷28= 0.18mole 1 mole Si…

Q: A 37.0 g sample of ice is held at -12.0 °C. If the ice absorbs 25800 J of heat, what state and…

A: We can determine the final state of the water from the final temperature.  The formula is : q = m ×…

Q: Determine the heat in joules to melt 52.75 moles of water given the heat of fusion is 6010 J/mol?

A: Heat of fusion is the amount of energy required for melting a given mass at its melting point…

Q: How many joules of energy must be removed from 131 g of water at 14.5 °C to form ice at 0 °C? How…

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Q: Two 20.0 g ice cubes at −18.0 ∘C are placed into 295 g of water at 25.0 ∘C. Assuming no energy is…

A: Q = nC ∆T Q= nL

Q: Calculate the total energy in kJ required to change the temperature of 591 g water from 96.0  oC to…

A: The process of cooling water from  96.0  oC to -111 oC will have below steps. 1) cooling hot water…

Q: How much energy (in kJ) is needed to convert 23.0 grams of ice at -10.0°C to water at 90°C?

A: In the heating process, the following steps will take place. 1) Heating of ice from -10.0 °C to its…

Q: 173.1 grams of water is cooled from 51.0°C to -37.4° C. What is the heat change (in Joules)?…

A: H2O (l), 51.0°C →q1 H2O(l), 0°C →q2H2O(s), 0°C →q3 H2O(s), -37.4° C The heat change for the…

Q: How much heat energy, in kilojoules, is required to convert 80.0 g of ice at −18.0 ∘C to water at…

A: Heat (q) is absorbed to convert ice to water.Here, we have to calculate the total heat consumed in…

Q: How much heat (in kJ) would be required to convert 23.4 g of ice to water at 0.00°C? (AHfus = 6.01…

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Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy would be needed to melt a 5.24-g…

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Q: Which of the following substances (initially at room temperature) dose require the greatest amount…

A: Higher the boiling point greater will be the amount of heat required to melt 1 mol of solid

Q: How much heat energy, in kilojoules, is required to convert 59.0 g of ice at −18.0 ∘C to water at…

A: Specific heat of ice (Cp) = 2.10 J/g. oCspecific heat of water (Cp) = 4.18 J/g. oCheat of fusion…

Q: How much heat is required to convert 135 g of ice at −15 °C into water vapor at 120 °C?

A: heat required is calculated by,q=m c ⊿Twhere,m=mass of samplec=specific heat of substance ⊿T=the…

Q: How much energy is required to melt 357 g of ice into liquid water at 0 °C? The heat of fusion for…

A: We can answer this question using the equation, Q = Lice × m Q is  the amount of heat required to…

Q: Calculate the amount of heat required to completely evaporate 625 mL of water at 25°C. The enthalpy…

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Q: A 5.00 g sample of water vapor, initially at 155*C is cooled at atmospheric pressure, producing ice…

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Q: The heat of fusion of pure silicon is 43.4 kJ/mol. How much energy in kJ would be needed to melt a…

A: Heat of fusion : Heat needed to conversion of 1 mol of solid to liquid is called heat of fusion…

Q: The heat required to raise the temperature of 52.00 g of chromium by 1°C is callec its heat of…

A: Given is, heat required to raised the temperature of 52.00g of chromium by 1°C is called ....?

Q: Calculate the heat released when 65.5g of water at 55.5 ° C cools to ice at 0.0 ° C. (Given that the…

A: Here we are required to find the heat energy released during freezing process

Q: Determine the amount of heat, in kJ, required to heat 19 g of solid Ca at 125 C to 851C (still…

A: Given; mass, temperatures

Q: 4. How much heat, in kJ, does it take to heat 10.0 g of ice from -24.0°C to 75.0°C? 5. Calculate the…

A: The specific heat of water is 4.184 J/g °C. It is related with heat absorbed or evolved by system as…

Q: How much heat is required to vaporize 30 g of water at 100˚C?

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Q: Calculate the total energy in kJ required to change the temperature of 786 g water from 96.0  oC to…

A: Heat energy is released when the temperature of water changes from 96oC to -111oC. Firstly, the…

Q: The melting point of calcium is 851 °C, its solid-state specific heat (Csolid) is 0.632 J/g°C, and…

A: a) Since at its melting point, the solid can be directly melted  hence the heat required will be  Q…