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How much heat is needed to vaporize 2.72 moles of nitrogen?
To calculate the heat needed to vaporize 2.72 moles of nitrogen, you can use the heat of vaporization for nitrogen, which is approximately 199 kJ/mol. Multiply the number of moles by the heat of vaporization: [ Q = 2.72 , \text{moles} \times 199 , \text{kJ/mol} \approx 541.28 , \text{kJ} ] Therefore, approximately 541.28 kJ of heat is needed to vaporize 2.72 moles of nitrogen.
How much energy is needed to melt 0.25 moles of water?
The necessary heat is 9,22 joules.
How much energy is needed to melt 25.4grams of l2?
To calculate the energy needed to melt 25.4 grams of I2 (iodine), you can use the formula: energy = mass x heat of fusion. The heat of fusion for iodine is 15.52 kJ/mol. First, find the molar mass of I2 (253.8 g/mol) and then convert the mass to moles. Finally, multiply the moles by the heat of fusion to get the energy needed.
What mass of needed to generate kj heat when reacting?
To determine the mass needed to generate a specific amount of heat (in kJ) during a reaction, you need to know the enthalpy change (ΔH) of the reaction, which indicates how much heat is absorbed or released per mole of reactant. Using the formula ( q = n \times ΔH ), where ( q ) is the heat in kJ and ( n ) is the number of moles, you can rearrange this to find ( n = \frac{q}{ΔH} ). Then, multiply the number of moles by the molar mass of the reactant to obtain the required mass.
How much heat is involved in the synthesis of 5.0 moles of ammonia?
The synthesis of 5.0 moles of ammonia involves the release of approximately 92.5 kJ of heat. This is because the reaction to form ammonia from its elements (N2 and H2) is exothermic, releasing 46.1 kJ/mol of heat. So, for 5.0 moles, it would be 5.0 moles * 46.1 kJ/mol = 230.5 kJ.
How much does a heat sink cost?
more detail needed of how much heat to absorb and size available .
How much enjergy is needed to melt 4.24 grams of Pd?
The energy required to melt a substance is its heat of fusion. For Palladium (Pd), the heat of fusion is 16.74 kJ/mol. To calculate the energy needed to melt 4.24 grams of Pd, first convert to moles by dividing by the molar mass of Pd (106.42 g/mol), then multiply by the heat of fusion. This yields approximately 3.34 kJ of energy needed to melt 4.24 grams of Pd.
How much heat is evolved when 251 g of ammonia gas condenses to a liquid at its boiling point?
To find the heat evolved, you can use the heat of vaporization for ammonia, which is 23.4 kJ/mol. First, calculate the number of moles in 251 g of ammonia, then multiply the moles by the heat of vaporization to get the total heat evolved.
How much ethanoic acid is needed to make 500ml of 0.1M solution?
To make a 0.1M solution of ethanoic acid in 500ml, you need 25g of ethanoic acid (CH3COOH) which is equivalent to approximately 0.416 moles.
If calcium oxide can be present by heating calcium metal in oxygen How much calcium would be needed to make 15.0 g of calcium oxide?
To find out how much calcium is needed to make 15.0 g of calcium oxide (CaO), you have to consider the molar ratio of calcium to calcium oxide. The molar mass of CaO is 56.077 g/mol, and the molar mass of Ca is 40.078 g/mol. This means that for every 1 mol of CaO, you need 1 mol of Ca. Calculate the number of moles of CaO in 15.0 g, then use the molar ratio to find the moles of Ca needed. Finally, convert the moles of Ca to grams to find out how much calcium is needed to make 15.0 g of CaO.
How much energy is needed to melt 4.24 grams of Pd?
The energy required to melt a substance can be calculated using the heat of fusion value for that substance. The heat of fusion for palladium (Pd) is 16.74 kJ/mol. To convert grams to moles, divide the given mass by the molar mass of Pd (106.42 g/mol), then multiply by the heat of fusion value to find the energy needed to melt 4.24 grams of Pd.
How much heat requires one litre of water evaporates?
The needed heat is 2 258 kJ.
