Along cylindrical wood log (k = 0.17 w/m·k and α = 1.28 × 10−7 m2/s) is 10 cm in diameter and is initially at a uniform temperature of 25°c. it is exposed to hot gases at 525°c in a fireplace with a heat transfer coefficient of 13.6 w/m2·k on the surface. if the ignition temperature of the wood is 375°c, determine how long it will be before the log ignites. solve this problem using the analytical one-term approximation method.

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride