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Hydrolyziz
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Homework Statement
How many grams of ethylene (C2H4) would have to be burned to produce 450 kJ of heat?
C2H4 + 3O2 ----> 2CO2 + H2O Delta H = -1411 kJ
The Attempt at a Solution
No clue
To calculate the grams of C2H4 needed to produce 450 kJ of heat, you will need to use the formula Q = m*C*ΔT, where Q is the heat required, m is the mass of the substance (in this case C2H4), C is the specific heat capacity of the substance, and ΔT is the change in temperature. Make sure to convert the given heat value into joules (kJ to J) and the specific heat capacity of C2H4 is 1.26 J/g°C.
The specific heat capacity of C2H4 is 1.26 J/g°C. This means that it requires 1.26 joules of energy to raise the temperature of 1 gram of C2H4 by 1 degree Celsius.
To convert kJ (kilojoules) to J (joules), you need to multiply the given value by 1000. This is because 1 kJ is equal to 1000 J.
The specific heat capacity is important in the calculation because it takes into account the unique properties of a substance, such as its molecular structure and composition, which affects how much energy is required to raise its temperature. Using the specific heat capacity ensures a more accurate calculation.
Yes, there are other factors that may affect the accuracy of the calculation. These include any heat losses to the surroundings, incomplete combustion of C2H4, and the use of an incorrect specific heat capacity value. It is important to consider and minimize these factors to ensure a more accurate calculation.