Posted by **missy** on Sunday, April 22, 2007 at 2:05pm.

The specific heat capacity of the lava is 1600 J kg^-1 degres celsuis ^-1. when all the erupted lava cools from the eruption temperature of 1050 degrees Celsius to 15 degrees celsius, the heat released is 2 x 10 ^15 J.

calculate a value for the total mass of lava that erupted. give your answer in scientific notation.

plzzz some one help meeee....

i posted this question before and i still don't get how u work out the mass

Use the equation

(Heat release) = Mass x (specific heat) x (change in temperature)

Rearrange it algebraically to solve for the mass.

is this right ...in that case ..or where am going wrong !!

1600 J kg -1 °C -1 x 2 x 10 15 J x 1035 °C = 3.312 x 10 21 kgs

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