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How many joules of energy are absorbed when 250 g Pb is heated from 25 C to 245 C?
The specific heat capacity of lead, Cg = 0.130 J g-1 K-1
The specific heat capacity is a measure of how many joules of energy it takes to raise one gram of the substance one degree. Kelvin is a temperature scale that has the same graduations as Celsius (Centigrade) but starts at -273.15 below 0oC.
Energy = Cg x mass x change in temperature
= 0.130 x 250 x 220
= 7150 J g-1 K-1
or 7.15 kJ g-1 K-1
What else can I help you with?
How many joules in a kg of coal?
On average, coal has an energy content of about 24,000,000 joules per kilogram. This energy content can vary depending on the type and quality of the coal.
How many joules are lost to the environment for each 100 joules of chemical energy stored in the coal?
It depends on the efficiency of the coal conversion process. If the process is 30% efficient, then 70 joules would be lost to the environment for every 100 joules of chemical energy stored in coal.
How many joules are in 56 kilo joules?
There are 56,000 joules in 56 kilojoules. This is because there are 1,000 joules in a kilojoule.
How much energy in joules must be absorbed to convert to Na all the atoms present in 1mg of gaseous Na when the first ionization energy is 495.8 kj per mol?
The first step is to calculate how many moles of Na are present in 1 mg (0.001 g) of Na. Since the molar mass of Na is 22.98977 g/mol, there are 0.000043 moles of Na. Next, convert the ionization energy to joules by multiplying by 1000 (1 kJ = 1000 J) to get 495,800 J/mol. Finally, multiply the number of moles by the energy per mole to find the total energy required: 495,800 J/mol * 0.000043 mol = 21.3 J.
How many joules are required to melt 12.8 g of ice at 0 and degC?
The amount of energy required to melt ice is given by the formula Q = m * L, where Q is the energy in joules, m is the mass in grams, and L is the heat of fusion for ice (334 J/g). Plugging in the values, we find that it would take 12.8 g * 334 J/g = 4288 joules to melt 12.8 g of ice at 0°C.
How many joules of energy were added to the saucepan?
The joules of energy added to a saucepan depend on the amount of heat applied. You can calculate it by multiplying the heat capacity of the saucepan by the temperature change and the mass of the substance being heated.
If an endothermic process absorbs 263 Joules how many kilo-calories are absorbed?
To convert Joules to kilocalories, divide the amount of energy in Joules by 4184 (the conversion factor between Joules and kilocalories). Thus, 263 Joules is equivalent to approximately 0.063 kcal.
How many calories are present given 50.75 joules of energy?
50.75 joules of energy equates to about 12.1 calories.
How many joules are absorbed by the water with a mass of 5kg in orderto risethe temperature from 30 c to 65 c?
To calculate the energy absorbed by the water, you can use the equation Q = mcΔT, where Q is the energy absorbed, m is the mass of water (5kg), c is the specific heat capacity of water (4186 J/kg°C), and ΔT is the change in temperature (65°C - 30°C). Plugging in the values gives Q = 5kg * 4186 J/kg°C * (65°C - 30°C). Calculate this to find the energy absorbed in joules.
How many joules of energy in a kilo of coal?
On average, 1 kilogram of coal contains approximately 24,000,000 joules of energy.
How many joules of energy are released in a lightning bolt?
A typical lightning bolt releases about 1 billion joules of energy.
How many joules are saved by a energy efficient light bulb?
there are 100 joules in an energy efficient light bulb 75 joules go towards the light and 25 joules go towards the heat
How many joules of energy are typically released in a lightning strike?
A typical lightning strike releases about 1 billion joules of energy.
How much energy is needed to get a small electromagnet up to 1.6 Tesla it can be in joules watts or volts?
It had better be in joules. Watts and volts are not units of energy. yes, but how many as in ? joules/sec
How many kilo joules of energy are equivalent to 160 Calories?
160 Calories is equivalent to approximately 669 kilojoules of energy.
How many joules of energy are I now kilograms of coal?
10,100
How many joules does c4 produce?
A gram of C4 explosive produces approximately 6,700 joules of energy when detonated.
