Can somebody please help me with the question 1. Calculate the change in the int
ID: 543968 • Letter: C
Question
Can somebody please help me with the question 1. Calculate the change in the int processes are endothermic or exothermic: (10) a. 76 J of heat is transferred to the surroundings from the s b. 110 J of work is performed by the surroundings to the system. ystem. Answer: E- the process is Answer: E = the process is : . When 89 J of system to the surroundings. Answer: E = c. work is done by the surroundings to the system, 42 J of heat is transferred from the the process is 10.0 g sample of water is heated from 25°C to 35°C, thereby absorbing 15.8 kJ of heat from the surroundings. Answer: E = the process is An internal combustion engine performs 51 kJ of work to the surroundings and transfers 80 kJ of heat to the surroundings. Answer: E = e. the process isExplanation / Answer
The basis will be
dE = Q - W
where Q is + for Absorbed and W is + for "system doing work"
a)
if Q is released, then
dE = -Q = -76
the process is exothermic
b)
if surr. does work on system, then
W = negative,
dE = increases in 110 J, the process is most likely exothermic
c)
W = -89; Q = -42
dE = -42 - - 89
dE = 47
endothermic
d)
Q = +15.8
W = 0
dE = 15.8
this is endothermic
e)
W = 51
Q = -80
dE = -80 - 51 = -131
exothermic