Question

specific heat practice review ii
station 1 temperature change

1. calculate the change in temperature for the following:

a)23 c to 73 c
b) -12 c to 56 c
c) 13 c to 108 c
d) -2 c to 85 c
e) 23 c to 92 c
f) 6.7 c to 13.4 c
g) 65 c to 237 c
h).05 c to 1.2 c
i) 45.7 c to 67.2 c
j) 56.3 c to 235.2 c
2)supply the variable names and units for the following symbols:
a. q =
b. m =
c. cp =
d. change in temp. =
e. in your own words, define specific heat

Explanation:

Step1: Calculate temperature change for a)

Subtract initial from final temperature. $73 - 23=50$

Step2: Calculate temperature change for b)

$56-(- 12)=56 + 12 = 68$

Step3: Calculate temperature change for c)

$108 - 13=95$

Step4: Calculate temperature change for d)

$85-(-2)=85 + 2=87$

Step5: Calculate temperature change for e)

$92 - 23 = 69$

Step6: Calculate temperature change for f)

$13.4 - 6.7 = 6.7$

Step7: Calculate temperature change for g)

$237 - 65=172$

Step8: Calculate temperature change for h)

$1.2-0.05 = 1.15$

Step9: Calculate temperature change for i)

$67.2 - 45.7=21.5$

Step10: Calculate temperature change for j)

$235.2 - 56.3 = 178.9$

Step11: Define variables for 2)a

$Q$ is heat energy, unit is joule (J)

Step12: Define variables for 2)b

$M$ is mass, unit is kilogram (kg)

Step13: Define variables for 2)c

$C_p$ is specific - heat capacity, unit is joule per kilogram per degree Celsius ($J/(kg\cdot^{\circ}C)$)

Step14: Define variables for 2)d

Change in temp. is $\Delta T$, unit is degree Celsius ($^{\circ}C$)

Step15: Define specific heat for 2)e

Specific heat is the amount of heat energy required to raise the temperature of one - kilogram of a substance by one degree Celsius.

Answer:

1. a) $50^{\circ}C$; b) $68^{\circ}C$; c) $95^{\circ}C$; d) $87^{\circ}C$; e) $69^{\circ}C$; f) $6.7^{\circ}C$; g) $172^{\circ}C$; h) $1.15^{\circ}C$; i) $21.5^{\circ}C$; j) $178.9^{\circ}C$
2. a. Heat energy, J; b. Mass, kg; c. Specific - heat capacity, $J/(kg\cdot^{\circ}C)$; d. $\Delta T$, $^{\circ}C$; e. The amount of heat energy required to raise the temperature of one - kilogram of a substance by one degree Celsius.