A reactive element with a relatively high electronegativity would be expected to have a relatively

Use Hess’s Law and the following data   CH4(g) + 2 O2(g) → CO2(g)   +  2 H2O(g) ΔH = −802 kJ CH4(g) + CO2(g) → 2 CO(g)   +  2 H2(g) ΔH = + 247 kJ CH4(g) + H2O(g) → CO(g)   +  3 H2(g) ΔH = + 206 kJ   to determine the ∆H°rxn for the following reaction, an important source of hydrogen gas:   2 CH4(g) + O2(g) →  2 CO(g)   +  4 H2(g)   Must show your work (scratch paper) to receive credit.

Which depends only on the initial and final state?

Acetylene (C2H2) torches are typically used for welding applications. How much heat in kJ evolve when 2.35 kg of acetylene are burned in excess oxygen gas? The reaction is given by: Must show your work (scratch paper) to receive credit. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(l)       ΔH°rxn = – 2599.0 kJ

For a particular process that is carried out at constant pressure, q = 200 kJ and w = -85 kJ. Therefore,

Use the standard enthalpies of formation provided to calculate the change in enthalpy for the reaction below: C3H8(g)  +  H2(g) → C2H6(g)   + CH4(g)    ΔH°f (kJ/mol) C3H8(g)  -103.85 C2H6(g)  – 84.68 CH4(g)  – 74.6 Must show your work (scratch paper) to receive credit.

Write the condensed (short form) electron configuration for Cl:( Make sure to follow the order following the Aufbau principle. Do not consider exceptions. Do not use superscripts, do not write the brackets on the noble gas. Use the following format Ne – 3s2 ….)

Which ion has the largest radius?                   Ca+2, Ca+1, Br-, K+ 

A gold nugget (mass = 376 g) is originally at 398 K is placed in cold water. Its temperature drops to 297 K. If the specific heat capacity of gold is 0.128 J/g°C, how much heat was lost by the gold nugget? Must show your work (scratch paper) to receive credit.

Phosphorylation of which protein(s)’s C-terminal domain tail serves as the timer and spatial organizer of eukaryotic transcription?