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## Calculate the total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees

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## Answers ( )

Answer:The amount of heat absorbed is 141.004 kJ.Explanation:In order to calculate the amount of heat released while converting given amount of steam (gaseous state) to ice (solid state),

few processes are involved:(1):

(2):

(3):

(4):

Calculating the heat absorbed for the process having the same temperature:……(i)

where,

q is the amount of heat absorbed, m is the mass of sample and is the enthalpy of fusion or vaporization

Calculating the heat released for the process having different temperature:……(ii)

where,

= specific heat of solid or liquid

are final and initial temperatures respectively

For process 1:We are given:Putting values in equation (i), we get:For process 2:We are given:Putting values in equation (i), we get:For process 3:We are given:Putting values in equation (i), we get:For process 4:We are given:Putting values in equation (i), we get:Calculating the total amount of heat released:(Conversion factor: 1 kJ = 1000J)Hence, the amount of heat absorbed is 141.004 kJ.