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How many of energy are involved in heating 45.0 g of Substance X (MM 125.00 g/mol, melting point-20.0°C, boiling point 100.0
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Answer #1

As phase of Substance X is not changing here. So, we will use Q = mcDT. (Where DT is difference of temprature)

Here, DT = (50 - (-10)) oC = 60oC

Heat involved in heating 45g of X = mcDT

                                                      = 45g    x    3.4 J/(g oC)   x    60oC

                                                      = 9180 J

                                                      = 9.18 kJ

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