手动用气筒给自行车充气时,发现气筒会变热,以气筒为研究对象,该过程中热量q和功w的符号分别为( )。
A. + +
B. + -
C. - +
D. - -
相同温度下,下列物质中标准摩尔熵最小的是
A. HF(g)
B. I2(s)
C. I2(g)
D. HI(g)
下列物质中标准摩尔生成焓为零的是
A. 液态水
B. 固态冰
C. 气态水
D. 碳(石墨)
According to Text A Work Labor and Play, what are the definitions of “Labor”, “ Play “and “Work”.Labor is all about the ________ and no _______.Play is all about _________ and no _______.Work is where _________ and ________ are met.