Fast how much heat energy is added to 5 grams of water if the initial temperature was 50°c and the final temperature was 60°c? (the specific heat of water is 4.18 j/g°c)

Energy added  = mass*specific heat* rise in temperature.

= 5 * (60-50) * 4.18

=  50*4.18

= 209 J (answer).

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.

try answer.com that works for me