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Ask us anythingIf you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy?
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How many calories are required at 0 degree Celsius to melt an ice cube with a mass of g?
What you need is the enthalpy of fusion for ice and simply multiply it by your mass. An online search shows that the enthalpy of fusion for ice is: 79.72 cal/g So calories needed to melt all your ice is just. Energy = 79.72cal/g x 25g = 242.50 calories
How is the h vaporization used to calculate the mass of liquid boiled by on of energy?
The specific enthalpy of vaporization (usually represented by the letter H with a carat above it) is generally given as units of energy per unit mass or per mole. If given in terms of per unit mass, the mass boiled can be calculated by dividing the energy input by the specific enthalpy. If given in terms of per mole, first divide the energy by the specific enthalpy then multiply the result by the mass per mole.
What is the enthalpy change for 5O2 plus C3H8 to 3CO2 plus 4H2O?
typically you will be given values for the heat necessary/released by each when it is created (H2O and CO2) and when its used (C3H8).. then balance the equation and multiply the coefficients by energy used for each element, then subtract one side from the other to get an answer... remember 02 will not have an amount of KJ released.
When are the quantites molar enthalpies of fusion and molar enthalpy of vaporation used?
Fusion refers to the phase change from liquid to solid (or vv) and vaporization refers to the phase change from liquid to gas (or vv). Heat is either absorbed or released from the substance when these events occur. We use the molar enthalpies to calculat exactly how much heat is transferred during these processes. Ex .. If we are to boil (vaporize) 3 moles of some substance with a known molar enthalpy of vaporization of 120 KJ/mole then we multiply. 3 moles x 120 KJ/mole = 360 KJ of energy is needed for the vaporization to take place.
How do you convert the following direct statement scale 1 CM equals 102.922488 KM to a RF scale?
multiply the number by 100,000 to the the R.F scale number.
If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you use for this intermediate reac?
-572k
If you multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you use for this intermediate reaction?
-572 k
If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you?
572 kJ (just multiply like you would in algebra)
If you need to multiply the reaction by 2 to be an intermediate reaction in a hess law problem what would be the final value for the enthalpy of reaction you use for this intermediate reaction?
-572k
If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction yo?
2820 kJ
What is the difference between enthalpy change and enthalpy change per mole?
Enthalpy is the energy absorbed or lost from a reaction, but enthalpy change per mole is the amount of energy lost per mole, so in order to get the overall enthalpy from the change per mole, you must multiply that value by the amount of moles used in the reaction.
How many calories are required at 0 degree Celsius to melt an ice cube with a mass of g?
What you need is the enthalpy of fusion for ice and simply multiply it by your mass. An online search shows that the enthalpy of fusion for ice is: 79.72 cal/g So calories needed to melt all your ice is just. Energy = 79.72cal/g x 25g = 242.50 calories
How much heat will be released when 6.44 grams of sulfur reacts with excess iron oxide?
You need to know the ∆H of this reaction, or the enthalpy change. If you know the enthalpy change, then convert the 6.44 g of sulfur to moles, and use stoichiometry to determine what fraction of a mole was reacted, and multiply that time the value of ∆H of the reaction
How is the h vaporization used to calculate the mass of liquid boiled by on of energy?
The specific enthalpy of vaporization (usually represented by the letter H with a carat above it) is generally given as units of energy per unit mass or per mole. If given in terms of per unit mass, the mass boiled can be calculated by dividing the energy input by the specific enthalpy. If given in terms of per mole, first divide the energy by the specific enthalpy then multiply the result by the mass per mole.
How do you convert the following units of 2kilometer to meter?
You multiply by 1000.
What does the arithmetic operator do in Excel?
The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)The following are valid Excel operations for arithmetic in Excel:+ (plus)- (minus)/ (divide)* (multiply)^ (power of)
Answer the following is 3 a multiple of 6?
Yes, if you multiply 6 by 0.5
