From the enthalpies of reaction 2c(s)+o2(g) 2c(s)+o2(g)+4h2(g)→→2co(g)2ch3oh(g)δhδh=−221.0kj=−402.4kj calculate δh for the reaction co(g)+2h2(g) → ch3oh(g)

(#1) 2C(s) + O2(g) = 2CO(g), ΔH=-221.0 kJ (#2) 2C(s) + O2(g) + 4H2(g) > 2CH3OH(g) , Δ=-402.4 kJ Description of equation below ( #1a) Reversed (#1), multiply including (1/2) (Including enthalpy), changed sign of enthalpy (#2a) Multiplied (#2) by 1/2 (including enthalpy) ( #1a) CO(g)> C(s) + 1/2 O2(g), Δ=+110.5 kJ (#2a) C(s) + 1/2O2(g) + 2H2(g)> CH3OH, Δ= -201.2 kJ Cancel likes amount on opposite sides of the arrow, and do the arithmetic for , Δ: CO(g) + 2H2(g) > CH3OH, ΔHrxn = -90.7 kJ

It made it possible to actually see cells.

Explanation: With the development and improvement of the light microscope, the theory created by Sir Robert Hooke that organisms would be made of cells was confirmed as scientist were able to actually see cells in tissues placed under the microscope.