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The initial temperature of 0.8 kg of ice was -5 Celsius. How much energy is needed to cause the ice to start to melt?
specific heat of ice = 2.09 J/g/degree2.09 J/g/deg x 800 g x 5 deg = 8360 J = 8.4 kJ∆Hfusion = 334 J/g0.8kg x 334 J/g x 1000 g/kg x 1 kJ/1000 J = 267 kJ8.4 kJ + 267 kJ = 275.4 kJ
If the heat of vaporization for water is 2260 Jg how many kilojoules are required to convert 5.00 g of liquid water at 100C to steam at 100C?
The heat required to vaporize 5.00 g of water is given by: 2260 J/g * 5.00 g = 11300 J. Converting this to kJ gives 11.3 kJ.
How much heat is required to melt 98.5 g of ice at its melting point?
The ∆Hfusion for water is 333.55 J/g. Thus, q = 98.5 g x 333.55 J/g = 32,855 J = 32.9 kJ (3 sig figs)
What mass if water in grams must form in order to produce 975kJ of energy?
To determine the mass of water that must form to produce 975 kJ of energy, we can use the concept of the heat of vaporization of water, which is approximately 2260 J/g. First, convert 975 kJ to joules: 975 kJ = 975,000 J. Then, divide the total energy by the heat of vaporization: ( \text{mass} = \frac{975,000 \text{ J}}{2260 \text{ J/g}} \approx 431.87 \text{ g} ). Thus, about 432 grams of water must form to produce 975 kJ of energy.
How is the Hvap used to calculate the mass of liquid boiled by one kj of energy?
The Hvap is usually given as J/g or J/mole for example. Let's say you have it in J/g. For water this is about 2260 J/g, meaning it takes 2260 joules to vaporize 1 g of water. Set up an equation using dimensional analysis: 1 kJ x 1000 J/kg x 1 g/2260 J = 0.44 g
What is the tango's apparel?
j,k,m,,kj,kj,
How much work did a system do in kJ when a system absorbs 650 J during a change and the value was -2.37?
The work done by the system can be calculated using the formula: Work = Force × Distance × cos(θ). Since work is given as -2.37 kJ, we convert this value to joules (1 kJ = 1000 J). So, the work done is -2.37 kJ × 1000 J/kJ = -2370 J. Therefore, the work done by the system when it absorbs 650 J of energy during a change is -2370 J + 650 J = -1720 J or -1.72 kJ.
k j equals j but how is that?
The energy E in joules (J) is equal to 1 kilojoule times 1000: E (J) = 1kJ × 1000 = 1000J . So 1 kilojoule (kJ) is equal to 1000 joules (J): 1 kJ = 1000 J .
The initial temperature of 0.8 kg of ice was -5 Celsius. How much energy is needed to cause the ice to start to melt?
specific heat of ice = 2.09 J/g/degree2.09 J/g/deg x 800 g x 5 deg = 8360 J = 8.4 kJ∆Hfusion = 334 J/g0.8kg x 334 J/g x 1000 g/kg x 1 kJ/1000 J = 267 kJ8.4 kJ + 267 kJ = 275.4 kJ
How do you mention kilojoule units?
kJ for kilojoules and J for joules.
If 3 moles of a compound use 12 J of energy in a reaction what is the H reaction in kJmol?
12 J/3 moles = 4 J/mole. Thus, H of reaction in kJ/mole = 0.004 kJ/mole
What was life like for an average person in france?
hjujj;kj;j
What is 1 kj?
It is 1000 J. K meand time 10^3
In chemistry what does KJ mean?
That is an abbreviation for a kilojoules, a metric measure of energy.
If the heat of vaporization for water is 2260 Jg how many kilojoules are required to convert 5.00 g of liquid water at 100C to steam at 100C?
The heat required to vaporize 5.00 g of water is given by: 2260 J/g * 5.00 g = 11300 J. Converting this to kJ gives 11.3 kJ.
What symbol is used for joules?
just 'J' so kJ for kilojules, you can google this easily
Which shows a correct conversion between joules kilojoules?
4.5 kJ = 4500 J
