(Solved): 8.000g of Compound X with molecular formula C5H10 are burned in a constant-pressure calorim ...

$8.000\mathrm{g}$ of Compound $X$ with molecular formula ${\mathrm{C}}_5{\mathrm{H}}_{10}$ are burned in a constant-pressure calorimeter containing $20.00\mathrm{kg}$ of water at: 25 . $\mathrm{C}$. The temperature of Calculate the standard heat of formation of compound $X$ at $25.C$. Be sure vour answer has a unit symboh, if necessary, and round it to the correct number of significant digits