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To calculate the number of kilocalories required to heat something up, you need to know the specific heat capacity of the substance. The specific heat capacity of water is 1 calorie/gram°C. The formula to calculate the heat energy required is Q = mcΔT, where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
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How many kilocalories of heat does an expenditure of 240kJ produce?
To convert kilojoules (kJ) to kilocalories, you can use the conversion factor of 1 kJ is equivalent to 0.239 kcal. So, 240 kJ is equal to 240 x 0.239 ≈ 57.4 kilocalories of heat.
How many kilocalories does it take to heat water from 65 oF to 105 oF?
To heat 1 gram of water by 1 degree Celsius, it takes 1 calorie. Therefore, to heat water from 65 oF to 105 oF, you would need 40 calories per gram of water. If you are working in kilocalories, this would be equivalent to 0.04 kilocalories.
In what units is heat flow measured?
Heat flow is typically measured in units of watts (W) or joules per second (J/s).
A college student produces about 100 kilocalories of heat per hour on the average what is the rate of energy production in watts?
To convert kilocalories per hour to watts, divide by 860: 100 kilocalories per hour / 860 = 0.1163 watts. So, the college student's rate of energy production is approximately 0.1163 watts.
Is kilocalories heat content of food or energy content of food?
It could be either; but when you are talking about food, what is of interest is usually the energy content - meaning, chemical energy stored in the food. Heat IS energy, and a kilocalorie is the energy required to heat one kilogram of water by one degree Celsius.
What is needes for a fuel to burn?
Oxygen and heat to get things going
How many kilocalories of heat does an expenditure of 240kJ produce?
To convert kilojoules (kJ) to kilocalories, you can use the conversion factor of 1 kJ is equivalent to 0.239 kcal. So, 240 kJ is equal to 240 x 0.239 ≈ 57.4 kilocalories of heat.
How many kilocalories does it take to heat water from 65 oF to 105 oF?
To heat 1 gram of water by 1 degree Celsius, it takes 1 calorie. Therefore, to heat water from 65 oF to 105 oF, you would need 40 calories per gram of water. If you are working in kilocalories, this would be equivalent to 0.04 kilocalories.
How many kilocalories are required to melt 16g of ice?
This heat is 32,48 joules.
How many kilocalories of heat are required to raise the temperature of 225g of aluminum form 20 degrees c?
The specific heat capacity of aluminum is 0.897 J/g°C. To convert this to kcal/g°C, we divide by 4.184 to get 0.214 kcal/g°C. Therefore, the total kilocalories of heat required to raise the temperature of 225g of aluminum from 20°C would be 225g * 20°C * 0.214 kcal/g°C = 966 kcal.
In what units is heat flow measured?
Heat flow is typically measured in units of watts (W) or joules per second (J/s).
What does kilocalories mean?
Kilo means 1,000, so kilocalories means a thousand calories.
A college student produces about 100 kilocalories of heat per hour on the average what is the rate of energy production in watts?
To convert kilocalories per hour to watts, divide by 860: 100 kilocalories per hour / 860 = 0.1163 watts. So, the college student's rate of energy production is approximately 0.1163 watts.
How many kilocalories of heat are needed to raise the temperature of 460 grams of water from 13 C to 45 C?
The specific heat capacity of water is 1 calorie/gram °C. To convert this to kilocalories, we divide by 1000, so 1kcal/kg°C. The temperature change is 45 - 13 = 32°C. Therefore, the heat required is 460g * 32°C * 1kcal/kg°C = 14720 kcal.
Kilocalories to heat 160g of water in a kettle from 19 to 77 degrees Celsius?
The specific heat capacity of water is 4.18 J/g°C. First, convert 160g to 0.16kg. Then, use the formula: Q = m * c * ΔT, where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Plug in the values and convert the result to kilocalories.
Is kilocalories heat content of food or energy content of food?
It could be either; but when you are talking about food, what is of interest is usually the energy content - meaning, chemical energy stored in the food. Heat IS energy, and a kilocalorie is the energy required to heat one kilogram of water by one degree Celsius.
How many kilocalories of heat does the operation of a 1200-W hair dryer produce each second?
The heat produced by a 1200-W hair dryer can be converted to kilocalories by multiplying the power in watts by the conversion factor of 0.001 kcal/s per watt. Therefore, 1200 W hair dryer would produce 1.2 kilocalories of heat each second.
