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Amiraneli [1.4K]
3 years ago
6

How much energy would need to be input to completely boil 17.3 moles of ice starting at 0 degrees * C and going to 100°C?

Chemistry
1 answer:
kolezko [41]3 years ago
4 0

Answer:

Q = 934.911\,kJ

Explanation:

The energy needed to boil 17.3 moles of ice is:

Q = (17.3\,mol)\cdot \left[\left(40.5\,\frac{kJ}{mol} \right)+ \left(\frac{4.186}{1000}\,\frac{kJ}{g\cdot ^{\circ}C}  \right)\cdot \left(\frac{18.015\,g }{1\,mol} \right)\cdot (100^{\circ}C-0^{\circ}C)+\left(6\,\frac{kJ}{mol}\right)\right]Q = 934.911\,kJ

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How many grams of HNO3 are produced when 59.0 g of NO2 completely reacts?
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Answer:

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Explanation:

Step 1: Data given

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Step 2: The balanced equation

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Step 3: Calculate moles NO2

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Moles NO2 = 1.28 moles

Step 4: Calculate moles HNO3

For 3 moles NO2 we need 1 mol H2O to produce 2 moles HNO3 and 1 mol NO

For 1.28 moles NO2 we'll have 2/3 * 1.28 =0.853 moles HNO3

Step 7: Calculate mass HNO3

Mass HNO3 = 0.853 moles * 63.01 g/mol

Mass HNO3 = 53.7 grams

53.7 grams of HNO3 will be produced

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