2 years ago

What would be the temperature change if 3.0g of water absorbed 15 J of heat?

1 answer:

3 0

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Andreas93 [3]

The molar mass of PH3 is 34 g/mol, therefore the moles is:

moles PH3 = 225 g / (34 g/mol)

moles PH3 = 6.62 mol

The balanced equation is:

4PH3(g) + 8O2(g) → P4O10(g) + 6H2O

We see that 4 mol of PH3 is required for every mol of P4O10, therefore the number of moles of P4O10 is:

moles P4O10 = 6.62 mol * (1/4)

moles P4O10 = 1.65 mol

The molar mass of P4O10 is 283.89 g/mol, so the mass is:

mass P4O10 = 1.65 mol * 283.89 g/mol

mass P4O10 = 469.67 grams ~ 470 grams

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3 years ago