How much heat is required to raise the temperature of a 825 g block of wood (specific
neat = 1.8 J/g°C) from 22.0°C to 155.0°C?

Q = 197505J

Explanation:

Mass (m) = 825g

Specific heat capacity (c) = 1.8J/g°C

Initial temperature (T1) = 22°C

Final temperature (T2) = 155°C

Heat energy (Q) = ?

Q = mc∇t

Q = mc(T2 - T1)

Q = 825 * 1.8 * (155 - 22)

Q = 1485 * 133

Q = 197505J

The heat energy required to raise it through that temperature is 197505J

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.