The heat is evolved when 24.9 g of propanol (C3H7OH) is burned is 834.15 J
To solve this question, First, we need to find the number of moles present in 24.9 g of propanol.
⇒ Formula
- n = M/m................. Equation 1
⇒ Where:
- n = number of moles
- M = mass of propanol
- m = molar mass of propanol
From the question,
⇒ Given:
- M = 24.9 g
- m = (12×3)+(1×8)+16 = 36+8+16 = 60 g/mol
⇒ Substitute these values into equation 1
⇒ Finally the heat evolved is
- Q = nΔH
- Q = 0.415(-2010)
- Q = -834.15 J
Hence, The heat evolved when propanol is burned is 834.15 J
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